{"id":119949,"date":"2024-10-24T01:32:11","date_gmt":"2024-10-24T08:32:11","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=119949"},"modified":"2025-01-06T13:53:26","modified_gmt":"2025-01-06T21:53:26","slug":"how-does-a-car-heater-work","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/how-does-a-car-heater-work\/","title":{"rendered":"How Does a Car Heater Work?"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 8<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column119949_16643c-91 > .kt-inside-inner-col,.kadence-column119949_16643c-91 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_16643c-91 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column119949_16643c-91 > .kt-inside-inner-col{flex-direction:column;}.kadence-column119949_16643c-91 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column119949_16643c-91 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_16643c-91{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_16643c-91 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column119949_16643c-91 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_16643c-91 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-c84f92  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-30595d\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading119949_f6dcc4-5d, .wp-block-kadence-advancedheading.kt-adv-heading119949_f6dcc4-5d[data-kb-block=\"kb-adv-heading119949_f6dcc4-5d\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading119949_f6dcc4-5d mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading119949_f6dcc4-5d[data-kb-block=\"kb-adv-heading119949_f6dcc4-5d\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading119949_f6dcc4-5d img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading119949_f6dcc4-5d[data-kb-block=\"kb-adv-heading119949_f6dcc4-5d\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading119949_f6dcc4-5d summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading119949_f6dcc4-5d\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Car heating systems consist of a heater core, blower motor, heater hoses, heater control valve, and HVAC control panel. These parts work hand-in-hand with the cooling system to blow hot air into the cabin.&nbsp;<\/li>\n\n\n\n<li>When you turn on your car heater, the hot coolant flows from the engine to the heater core. A fan blows on the hot liquid, triggering a heat exchange that cools down the heater core while heating the air that then goes through the vents to the cabin.<\/li>\n\n\n\n<li>If your car heater isn&rsquo;t working, then it might be because of low coolant levels, a damaged blower fan motor, or a malfunctioning water pump.&nbsp;<\/li>\n\n\n\n<li>Keeping your car heater in good condition is all about proper maintenance. This includes regularly topping off your coolant and making sure it&rsquo;s clean.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>As the cold winter season approaches, it&rsquo;s about time to check on the condition of your <a href=\"https:\/\/www.carparts.com\/blog\/how-does-the-heat-in-a-car-work-and-how-to-make-the-most-of-your-car-heater\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"car heater\">car heater<\/a>. Car interior heating is every driver&rsquo;s best friend when it comes to staying warm and comfortable during those chilly days. To make sure your car heater is functioning as it should, it&rsquo;s a good idea to understand how a car heater works in the first place.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Does a Heater in a Car Work?<\/h2>\n\n\n\n<p>An internal combustion engine naturally produces heat every time it&rsquo;s turned on. But how exactly does this heat enter and regulate the temperature inside a cold cabin? Well, it&rsquo;s all thanks to the car heating system, which consists of the following parts:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/heater-core\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Heater core\">Heater core<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blower-motor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Blower motor\">Blower motor<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/heater-hose\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Heater hoses\">Heater hoses<\/a><\/li>\n\n\n\n<li>Heater control valve<\/li>\n\n\n\n<li>Heating, ventilation, and air conditioning (HVAC) control panel<\/li>\n<\/ul>\n\n\n\n<p>These components work hand-in-hand with the cooling system&rsquo;s coolant, thermostat, radiator, and water pump. In other words, the vehicle&rsquo;s cooling system has to work for the heating system to work.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"782\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/automotive-heating-system-diagram-1024x782.jpg\" alt=\"diagram of an automotive heating system\" class=\"wp-image-123827\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/automotive-heating-system-diagram-1024x782.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/automotive-heating-system-diagram-300x229.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/automotive-heating-system-diagram-768x587.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/automotive-heating-system-diagram-150x115.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/automotive-heating-system-diagram.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Car heating system diagram | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>When the coolant passes through the engine, it picks up heat to prevent the engine from overheating. This coolant then flows through the radiator, where the heat is dissipated. However, when you turn on your car heater on a vehicle with a heater control valve, some of the hot coolant flows from the engine to the heater core.<\/p>\n\n\n<style>.kadence-column119949_bf2c97-bd > .kt-inside-inner-col,.kadence-column119949_bf2c97-bd > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_bf2c97-bd > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column119949_bf2c97-bd > .kt-inside-inner-col{flex-direction:column;}.kadence-column119949_bf2c97-bd > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column119949_bf2c97-bd > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_bf2c97-bd{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_bf2c97-bd > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column119949_bf2c97-bd > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_bf2c97-bd kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id119949_ca99ae-1d > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id119949_ca99ae-1d > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id119949_ca99ae-1d > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id119949_ca99ae-1d > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id119949_ca99ae-1d > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id119949_ca99ae-1d > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id119949_ca99ae-1d .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id119949_ca99ae-1d alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column119949_de8a35-3d > .kt-inside-inner-col{display:flex;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col{min-height:45px;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col,.kadence-column119949_de8a35-3d > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col > *, .kadence-column119949_de8a35-3d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_de8a35-3d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_de8a35-3d{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_de8a35-3d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column119949_de8a35-3d > .kt-inside-inner-col > *, .kadence-column119949_de8a35-3d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_de8a35-3d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column119949_de8a35-3d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col > *, .kadence-column119949_de8a35-3d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_de8a35-3d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_de8a35-3d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_de8a35-3d kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image119949_2a8595-2c.kb-image-is-ratio-size, .kb-image119949_2a8595-2c .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image119949_2a8595-2c.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image119949_2a8595-2c .kb-image-is-ratio-size{align-self:unset;}.kb-image119949_2a8595-2c figure{max-width:45px;}.kb-image119949_2a8595-2c .image-is-svg, .kb-image119949_2a8595-2c .image-is-svg img{width:100%;}.kb-image119949_2a8595-2c .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image119949_2a8595-2c\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column119949_0c3064-37 > .kt-inside-inner-col,.kadence-column119949_0c3064-37 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_0c3064-37 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column119949_0c3064-37 > .kt-inside-inner-col{flex-direction:column;}.kadence-column119949_0c3064-37 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column119949_0c3064-37 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_0c3064-37{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_0c3064-37 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column119949_0c3064-37 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_0c3064-37 inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\n            But not all vehicles have heater control valves; some flow hot coolant through the heater core all the time and regulate the inside temperature using the blend door to allow air from the blower motor to pass through the heater core, which is a heat exchanger like the radiator, only smaller.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<p>As the air passes through the fins of the heater core, the warmth is distributed to the floor, the windshield or the dash register as selected by the driver.<\/p>\n\n\n\n<p>When the engine is cold and the thermostat is closed, most engine platforms will bypass the thermostat and send the hot water through the heater core for quick cabin heat. But even after the thermostat opens, the water pump still pumps hot coolant through the heater core.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How Do Vehicles Regulate Cabin Temperature?<\/h3>\n\n\n\n<p>Older vehicles are usually equipped with a water-valve system that determines how much coolant flows to the heater core depending on the cabin temperature set by the driver.<\/p>\n\n\n<style>.kadence-column119949_c94a4c-46 > .kt-inside-inner-col,.kadence-column119949_c94a4c-46 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_c94a4c-46 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column119949_c94a4c-46 > .kt-inside-inner-col{flex-direction:column;}.kadence-column119949_c94a4c-46 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column119949_c94a4c-46 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_c94a4c-46{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_c94a4c-46 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column119949_c94a4c-46 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_c94a4c-46 kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id119949_e3c616-9c > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id119949_e3c616-9c > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id119949_e3c616-9c > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id119949_e3c616-9c > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id119949_e3c616-9c > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id119949_e3c616-9c .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id119949_e3c616-9c .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id119949_e3c616-9c > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id119949_e3c616-9c .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id119949_e3c616-9c alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col{display:flex;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col{min-height:45px;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col,.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > *, .kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_8fbdc2-95{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > *, .kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > *, .kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_8fbdc2-95 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_8fbdc2-95 kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image119949_b3f1a9-46.kb-image-is-ratio-size, .kb-image119949_b3f1a9-46 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image119949_b3f1a9-46.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image119949_b3f1a9-46 .kb-image-is-ratio-size{align-self:unset;}.kb-image119949_b3f1a9-46 figure{max-width:45px;}.kb-image119949_b3f1a9-46 .image-is-svg, .kb-image119949_b3f1a9-46 .image-is-svg img{width:100%;}.kb-image119949_b3f1a9-46 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image119949_b3f1a9-46\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column119949_22ac12-29 > .kt-inside-inner-col,.kadence-column119949_22ac12-29 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_22ac12-29 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column119949_22ac12-29 > .kt-inside-inner-col{flex-direction:column;}.kadence-column119949_22ac12-29 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column119949_22ac12-29 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_22ac12-29{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_22ac12-29 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column119949_22ac12-29 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_22ac12-29 inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\n            Since the coolant is bypassed through the heater core when the thermostat is closed, many heater control valves simply isolate the heater core from the coolant flow, returning it back to the engine through the heater control valve. This type of heater control valve will be connected to four hoses, two from the engine and two from the heater core.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<p>On the other hand, modern cars tend to use an air-blending system that uses flaps to let in cold outside air to mix with the heated air. This allows the hot air to cool down and reach the desired cabin temperature. This is called a &ldquo;blend door&rdquo; and is designed to blend hot and cold air as you turn the temperature knob on your A\/C control head.<\/p>\n\n\n\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"746\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/car-blend-door-diagram-1024x746.jpg\" alt=\"diagram of a car blend door\" class=\"wp-image-123828\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/car-blend-door-diagram-1024x746.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/car-blend-door-diagram-300x219.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/car-blend-door-diagram-768x560.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/car-blend-door-diagram-150x109.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/car-blend-door-diagram.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Blend door diagram | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Why Your Car Heater Isn&rsquo;t Working<\/h2>\n\n\n\n<p>Is there anything worse than a car heater that refuses to work in the winter? Not only is it uncomfortable and distracting, it can also be dangerous, especially in harsh climates. Here are the common reasons why your car heating system might be acting up:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Low Coolant Levels<\/h3>\n\n\n\n<p>If your engine is already hot but the heater isn&rsquo;t blowing hot air, you could be dealing with low coolant levels. Automotive heating systems rely on coolant to function properly, which means insufficient coolant will prevent it from getting hot air into the cabin.<\/p>\n\n\n\n<p>Low coolant is typically caused by a leak in the cooling system or by seepage into the cylinders past the head gasket over time. This creates air pockets.<\/p>\n\n\n\n<p>To get rid of these air pockets, you&rsquo;ll have to first fix the leak (if it&rsquo;s a hose, water pump, etc.,) and then fill the cooling system carefully to make sure all the air pockets are gone. Some cooling systems have bleeder valves that are supposed to be opened when the coolant is being added with the engine off.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Weak Water Pump<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"651\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/rusty-water-pump-1024x651.jpg\" alt=\"image of a rusty water pump\" class=\"wp-image-124024\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/rusty-water-pump-1024x651.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/rusty-water-pump-300x191.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/rusty-water-pump-768x488.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/rusty-water-pump-150x95.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/rusty-water-pump.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The water pump must be fully functional to move coolant through the heater core. If the water pump blades are rusted away (see photo) or the reaction surface the impeller spins next to is cavitated due to electrolysis, the heater won&rsquo;t work even if the car is full of coolant. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>The water pump in the photo is from a Ford Taurus that had no cabin heat but was full of coolant and wasn&rsquo;t overheating, but the water pump wasn&rsquo;t able to pump coolant through the heater core. <a href=\"https:\/\/www.carparts.com\/blog\/signs-of-a-bad-water-pump-is-it-time-to-replace-yours\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Replacing the water pump\">Replacing the water pump<\/a> restored the heater core coolant supply.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Damaged Blower Fan Motor<\/h3>\n\n\n\n<p>Is your auto heater blowing out little to no air even after turning it to the highest setting? This is likely caused by a <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-car-blower-motor-purpose-symptoms-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"damaged blower fan motor\">damaged blower fan motor<\/a>. It might feel warm inside your cabin, but the air likely isn&rsquo;t circulating as it should.<\/p>\n\n\n\n<p>When checking the motor, it&rsquo;s also a good idea to inspect its fuse, resistor, ground circuit, and wiring too. Of course, if the blower is running, there&rsquo;s no need to check all these things.<\/p>\n\n\n<style>.kadence-column119949_4a5f89-67 > .kt-inside-inner-col,.kadence-column119949_4a5f89-67 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_4a5f89-67 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column119949_4a5f89-67 > .kt-inside-inner-col{flex-direction:column;}.kadence-column119949_4a5f89-67 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column119949_4a5f89-67 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_4a5f89-67{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_4a5f89-67 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column119949_4a5f89-67 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_4a5f89-67 kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id119949_670454-32 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id119949_670454-32 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id119949_670454-32 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id119949_670454-32 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id119949_670454-32 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id119949_670454-32 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id119949_670454-32 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id119949_670454-32 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id119949_670454-32 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id119949_670454-32 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id119949_670454-32 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id119949_670454-32 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id119949_670454-32 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id119949_670454-32 > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id119949_670454-32 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id119949_670454-32 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id119949_670454-32 alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column119949_e80fd7-22 > .kt-inside-inner-col{display:flex;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col{min-height:45px;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col,.kadence-column119949_e80fd7-22 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col > *, .kadence-column119949_e80fd7-22 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_e80fd7-22 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_e80fd7-22{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_e80fd7-22 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column119949_e80fd7-22 > .kt-inside-inner-col > *, .kadence-column119949_e80fd7-22 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_e80fd7-22 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column119949_e80fd7-22 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col > *, .kadence-column119949_e80fd7-22 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column119949_e80fd7-22 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column119949_e80fd7-22 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_e80fd7-22 kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image119949_44998e-94.kb-image-is-ratio-size, .kb-image119949_44998e-94 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image119949_44998e-94.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image119949_44998e-94 .kb-image-is-ratio-size{align-self:unset;}.kb-image119949_44998e-94 figure{max-width:45px;}.kb-image119949_44998e-94 .image-is-svg, .kb-image119949_44998e-94 .image-is-svg img{width:100%;}.kb-image119949_44998e-94 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image119949_44998e-94\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column119949_60d531-63 > .kt-inside-inner-col,.kadence-column119949_60d531-63 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column119949_60d531-63 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column119949_60d531-63 > .kt-inside-inner-col{flex-direction:column;}.kadence-column119949_60d531-63 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column119949_60d531-63 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column119949_60d531-63{position:relative;}@media all and (max-width: 1024px){.kadence-column119949_60d531-63 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column119949_60d531-63 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column119949_60d531-63 inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\n            On vehicles with a cabin air filter, check to make sure it isn&rsquo;t clogged with dust. It happens sometimes and can restrict air flow from the blower, particularly when the system is on &ldquo;norm&rdquo; rather than &ldquo;recirc.&rdquo;\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Faulty Thermostat<\/h3>\n\n\n\n<p>A car with a heater that refuses to blow hot air might be hiding a <a href=\"https:\/\/www.carparts.com\/blog\/what-are-the-common-signs-of-a-bad-thermostat\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"faulty thermostat\">faulty thermostat<\/a> under the hood. When a thermostat is stuck open, the engine takes longer to warm up. The engine is likely to stay cold, preventing the heater from releasing hot air into the cabin. Typically this will turn on a Check Engine Light and set a code P0125.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>A faulty thermostat will typically turn on a Check Engine Light and set a code P0125.<\/p>\n<cite><em>&ndash;&nbsp;<\/em><a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Worn or Clogged Heater Core<\/h3>\n\n\n\n<p>The culprit behind the chilly temperature in your cabin might just be a <a href=\"https:\/\/www.carparts.com\/blog\/signs-of-a-bad-heater-core\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"clogged heater core\">clogged heater core<\/a>. This generally happens when the cooling jacket is loaded with rust, which will settle in the heater core and clog it to the point that no coolant can flow through.<\/p>\n\n\n\n<p>A worn heater core can also start to leak, causing coolant levels to drop along with the temperature in your cabin. You&rsquo;ll have to replace the heater core with a new one.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Stuck Blend Door<\/h3>\n\n\n\n<p>When you turn on the heater, the <a href=\"https:\/\/www.carparts.com\/blog\/bad-blend-door-actuator-symptoms-location-replacement-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"blend door\">blend door<\/a> shuts off the airflow from the A\/C, allowing only hot air from the heater to enter the cabin. Of course, this also works in reverse. The blend door can block hot air from entering the heater to allow only cold air to flow into the cabin. When the blend door gets stuck in this position, hot air won&rsquo;t enter from the vents.<\/p>\n\n\n\n<p>If the blend door is fine, inspect the blend door actuator next. The actuator controls the blend door&rsquo;s movements, which means it can easily stop hot air from entering your cabin if it fails.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How To Keep the Heater in Good Condition<\/h2>\n\n\n\n<p>Keeping your car heater in good condition is all about proper maintenance. This includes regularly topping off your coolant and making sure it&rsquo;s clean. Follow your manufacturer&rsquo;s recommended mix of antifreeze and water, and watch out for any leaks.<\/p>\n\n\n\n<p>You&rsquo;ll have to inspect the different components of your car heating system as well, including the thermostat, water pump, radiator, and heater core. Don&rsquo;t ignore any issues you spot, and consult a mechanic as soon as possible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Often Should You Inspect Your Car Heater?<\/h2>\n\n\n\n<p>When in doubt, it&rsquo;s always best to follow your manufacturer&rsquo;s recommended service interval, but inspecting your heating system at least once a year should be fine. It&rsquo;s best to do it ahead of winter, so you can be ready before the snow settles. Regular inspections can go a long way in catching any problems before they get worse.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Often Do You Need New Coolant?<\/h2>\n\n\n\n<p>The exact interval can vary depending on several factors, including your vehicle&rsquo;s year, make, and model, so check your vehicle&rsquo;s specific maintenance schedule to be sure. In general, however, it&rsquo;s best to flush and top off your car&rsquo;s coolant every 30,000 miles, but some allow for 100,000 miles coolant changes. Keeping coolant levels high and making sure there are no leaks will help your car heater work efficiently.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get High-Quality Heating Components for Your Vehicle<\/h2>\n\n\n\n<p>Having a functional heater is crucial, especially during the cold winter months. So it&rsquo;s in your best interest to replace any faulty component that can make your vehicle&rsquo;s heating system malfunction. The best way to do this is to order high-quality <a href=\"https:\/\/www.carparts.com\/heating-air-conditioning-and-components\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"heating components\">heating components<\/a> at <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a>.<\/p>\n\n\n\n<p>All our parts pass the highest quality control standards from industry professionals. That means you can count on them to perform like your stock part and last a long time. We make purchasing car parts online easier by providing accurate and detailed fitment information, making for a straightforward and hassle-free shopping experience.<\/p>\n\n\n\n<p>Use our vehicle selector to narrow down the catalog to the parts that fit your ride. Then, adjust the filters to view the products that match your preferred brand, price, and features.<\/p>\n\n\n\n<p>Order the replacement heating component you need at CarParts.com!<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 8<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>As the cold winter season approaches, it&rsquo;s about time to check on the condition of your car heater. Car interior&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/how-does-a-car-heater-work\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":120438,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3754,52],"tags":[],"ppma_author":[2607,2985],"class_list":{"0":"post-119949","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-air-conditioning-and-heating","8":"category-diy","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Does a Car Heater Work? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Trying to figure out how your car heater works? 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