{"id":95012,"date":"2023-10-20T00:22:40","date_gmt":"2023-10-20T07:22:40","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=95012"},"modified":"2025-03-12T20:10:48","modified_gmt":"2025-03-13T03:10:48","slug":"what-causes-condensation-in-a-car","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-causes-condensation-in-a-car\/","title":{"rendered":"What Causes Condensation In a Car?"},"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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column95012_a45e52-8d > .kt-inside-inner-col,.kadence-column95012_a45e52-8d > .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-column95012_a45e52-8d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column95012_a45e52-8d > .kt-inside-inner-col{flex-direction:column;}.kadence-column95012_a45e52-8d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column95012_a45e52-8d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column95012_a45e52-8d{position:relative;}@media all and (max-width: 1024px){.kadence-column95012_a45e52-8d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column95012_a45e52-8d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column95012_a45e52-8d inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-43effe  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-403b0f\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading95012_01d9ef-f0, .wp-block-kadence-advancedheading.kt-adv-heading95012_01d9ef-f0[data-kb-block=\"kb-adv-heading95012_01d9ef-f0\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading95012_01d9ef-f0 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading95012_01d9ef-f0[data-kb-block=\"kb-adv-heading95012_01d9ef-f0\"] 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-heading95012_01d9ef-f0 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading95012_01d9ef-f0[data-kb-block=\"kb-adv-heading95012_01d9ef-f0\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading95012_01d9ef-f0 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading95012_01d9ef-f0\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Condensation happens when warm air containing moisture touches cold surfaces like your car&rsquo;s windshield and windows.<\/li>\n\n\n\n<li>A clogged A\/C evaporator drain, wet carpets, and damaged door seals are some of the reasons why condensation can build up inside your cabin.<\/li>\n\n\n\n<li>Always make sure to keep your cabin dry and use your air conditioning unit to prevent condensation from building up inside the cabin.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Condensation can cause moisture to build up inside your car. It&rsquo;s something you shouldn&rsquo;t overlook because moisture can lead to visibility issues, especially if there&rsquo;s condensation in the windshield or any of the other glass. <a href=\"https:\/\/www.carparts.com\/blog\/4-reasons-why-your-car-a-c-smells-bad\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Mold\">Mold<\/a> and <a href=\"https:\/\/www.carparts.com\/blog\/tips-on-how-to-get-a-mildew-smell-out-of-your-car\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"mildew\">mildew<\/a> are also not uncommon if you don&rsquo;t take care of the problem immediately.<\/p>\n\n\n\n<p>Before discussing solutions, let&rsquo;s understand what causes the issue.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Is There Condensation Inside My Car?<\/h2>\n\n\n\n<p>Condensation happens when warm air containing moisture touches cold surfaces like your car&rsquo;s windshield and windows. It usually occurs when the temperature inside your car is significantly different from the temperature outside.<\/p>\n\n\n\n<p>While some condensation is normal due to moisture in the air, high humidity can cause the moisture to be worse. But extremely heavy condensation can mean there&rsquo;s a leak allowing water to enter the vehicle.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/what-to-do-if-your-car-gets-flooded\/\" target=\"_self\" rel=\"dofollow\" class=\"u11bd46b949c6eb0e0a89edaee2c4e7ad\"><style> .u11bd46b949c6eb0e0a89edaee2c4e7ad { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u11bd46b949c6eb0e0a89edaee2c4e7ad:active, .u11bd46b949c6eb0e0a89edaee2c4e7ad:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u11bd46b949c6eb0e0a89edaee2c4e7ad { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u11bd46b949c6eb0e0a89edaee2c4e7ad .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u11bd46b949c6eb0e0a89edaee2c4e7ad .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u11bd46b949c6eb0e0a89edaee2c4e7ad:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">What Should You Do With a Flooded Car?<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"976\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/12\/2001-mercury-marquis-grommet-976x1024.jpg\" alt=\"image of a 2001 mercury marquis grommet\" class=\"wp-image-98569\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/12\/2001-mercury-marquis-grommet-976x1024.jpg 976w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/12\/2001-mercury-marquis-grommet-286x300.jpg 286w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/12\/2001-mercury-marquis-grommet-768x806.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/12\/2001-mercury-marquis-grommet-150x157.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/12\/2001-mercury-marquis-grommet.jpg 1430w\" sizes=\"(max-width: 976px) 100vw, 976px\"><figcaption class=\"wp-element-caption\">This grommet wasn&rsquo;t seated during the installation of a new hood release cable on a 2001 Mercury Marquis, and the first time it rained after the work was done, water entered the car at this point. Grommets like this and wire harness grommets can cause water to enter. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n<style>.kadence-column95012_ccf31f-8c > .kt-inside-inner-col,.kadence-column95012_ccf31f-8c > .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-column95012_ccf31f-8c > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column95012_ccf31f-8c > .kt-inside-inner-col{flex-direction:column;}.kadence-column95012_ccf31f-8c > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column95012_ccf31f-8c > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column95012_ccf31f-8c{position:relative;}@media all and (max-width: 1024px){.kadence-column95012_ccf31f-8c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column95012_ccf31f-8c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column95012_ccf31f-8c 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-id95012_8e660a-db > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id95012_8e660a-db > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id95012_8e660a-db > .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-id95012_8e660a-db > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id95012_8e660a-db .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id95012_8e660a-db .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id95012_8e660a-db .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id95012_8e660a-db .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id95012_8e660a-db .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id95012_8e660a-db .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id95012_8e660a-db > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id95012_8e660a-db .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id95012_8e660a-db .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id95012_8e660a-db > .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-id95012_8e660a-db .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id95012_8e660a-db .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id95012_8e660a-db 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-column95012_cfb118-80 > .kt-inside-inner-col{display:flex;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col{min-height:45px;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col,.kadence-column95012_cfb118-80 > .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-column95012_cfb118-80 > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col > *, .kadence-column95012_cfb118-80 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column95012_cfb118-80 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column95012_cfb118-80{position:relative;}@media all and (max-width: 1024px){.kadence-column95012_cfb118-80 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column95012_cfb118-80 > .kt-inside-inner-col > *, .kadence-column95012_cfb118-80 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column95012_cfb118-80 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column95012_cfb118-80 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col > *, .kadence-column95012_cfb118-80 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column95012_cfb118-80 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column95012_cfb118-80 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column95012_cfb118-80 kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image95012_95f7d1-3b.kb-image-is-ratio-size, .kb-image95012_95f7d1-3b .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image95012_95f7d1-3b.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image95012_95f7d1-3b .kb-image-is-ratio-size{align-self:unset;}.kb-image95012_95f7d1-3b figure{max-width:45px;}.kb-image95012_95f7d1-3b .image-is-svg, .kb-image95012_95f7d1-3b .image-is-svg img{width:100%;}.kb-image95012_95f7d1-3b .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image95012_95f7d1-3b\"><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-column95012_da54c6-1b > .kt-inside-inner-col,.kadence-column95012_da54c6-1b > .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-column95012_da54c6-1b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column95012_da54c6-1b > .kt-inside-inner-col{flex-direction:column;}.kadence-column95012_da54c6-1b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column95012_da54c6-1b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column95012_da54c6-1b{position:relative;}@media all and (max-width: 1024px){.kadence-column95012_da54c6-1b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column95012_da54c6-1b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column95012_da54c6-1b 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            Sometimes water can enter the vehicle along the base of the windshield or through a poorly sealed body panel seam. Some 2000s Ford pickups may have water to enter around the high mount stop lamp at the top of the back of the cab.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<p>Here are some factors that can contribute to moisture buildup inside your car:&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clogged A\/C Evaporator Drain<\/h3>\n\n\n\n<p>If the evaporator drain on the A\/C is clogged with leaves or other debris, water can enter the vehicle due to an overflowing evaporator case from normal condensation on the condenser.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wet Carpets or Floor Mats<\/h3>\n\n\n\n<p>It&rsquo;s not uncommon to get in your car even when your shoes are wet, especially on rainy days. Unfortunately, your <a href=\"https:\/\/www.carparts.com\/carpet-kit\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"carpets\">carpets<\/a> or <a href=\"https:\/\/www.carparts.com\/floor-mats\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"floormats\">floormats<\/a> could absorb the moisture on your shoes, which could then condense on your ride&rsquo;s interior surfaces.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Damaged Door Seals<\/h3>\n\n\n\n<p>Seals or weatherstripping create a waterproof barrier between your ride&rsquo;s interior and exterior. They prevent water and other elements from entering your interior&mdash;at least until they wear out or get damaged as your ride racks up mileage.<\/p>\n\n\n\n<p>Because <a href=\"https:\/\/www.carparts.com\/door-seal\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"door seals\">door seals<\/a> are typically made of rubber, they can lose their flexibility over time. You can check the condition of your weatherstripping by squeezing them between your fingers. If they spring back, they&rsquo;re still in good condition. Otherwise, it&rsquo;s time to have your doors repaired.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Leaky Sunroof<\/h3>\n\n\n\n<p>A blocked water drain in your <a href=\"https:\/\/www.carparts.com\/blog\/the-difference-between-a-sunroof-and-a-moonroof-explained\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"sunroof\">sunroof<\/a> mechanism can cause leaks, allowing water to enter your interior when it&rsquo;s raining.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/what-are-common-sunroof-repairs\/#Leaking_Sunroof\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Sunroof leaks\">Sunroof leaks<\/a> aren&rsquo;t always that obvious. Sometimes, water can get in through your car&rsquo;s headliner and pillar panels. It&rsquo;s hard to notice it until you step on a wet floor mat or notice moisture in your car seats.<\/p>\n\n\n\n<p>If you suspect that your sunroof is leaking, don&rsquo;t think twice about taking your car to a professional. Besides condensation, leaks can damage your interior in the long run.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Old Cups of Coffee or Open Water Bottles<\/h3>\n\n\n\n<p>Leaving your old cup of coffee or open water bottle in your car can contribute to condensation inside your car. Over time, these containers can release moisture that can condense on your window glass and windshield.&nbsp; So don&rsquo;t leave coffee cups and water bottles inside your car for a long time.&nbsp;<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Bad Heater Core<\/h3>\n\n\n\n<p>Although there are a lot of unalarming reasons why condensation happens in your car, there&rsquo;s one that&rsquo;ll give you a headache. A <a href=\"https:\/\/www.carparts.com\/blog\/signs-of-a-bad-heater-core\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"bad heater core\">bad heater core<\/a> can cause condensation in your car.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/top-10-best-gift-ideas-for-your-dads-pickup-truck-this-fathers-day\/\" target=\"_self\" rel=\"dofollow\" class=\"u2c2bd655d403ccc7e5a4746b9631ffb1\"><style> .u2c2bd655d403ccc7e5a4746b9631ffb1 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u2c2bd655d403ccc7e5a4746b9631ffb1:active, .u2c2bd655d403ccc7e5a4746b9631ffb1:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u2c2bd655d403ccc7e5a4746b9631ffb1 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u2c2bd655d403ccc7e5a4746b9631ffb1 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u2c2bd655d403ccc7e5a4746b9631ffb1 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u2c2bd655d403ccc7e5a4746b9631ffb1:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">Top 10 Best Gift Ideas for Your Dad&rsquo;s Pickup Truck this Father&rsquo;s Day<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/heater-core\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"heater core\">heater core<\/a> is a radiator-like component that helps warm your car&rsquo;s interior. Once there&rsquo;s a leak in the heater core, warm coolant can enter the cabin, creating condensation.<\/p>\n\n\n\n<p>A sign that a bad heater core is the culprit is when the window glass will feel greasy. You might also notice a sweet smell throughout the interior, indicating that coolant is leaking out.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Prevent Condensation In a Car<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-1024x682.jpg\" alt=\"man cleaning car interior to avoid moisture\" class=\"wp-image-95013\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/man-cleaning-car-interior-to-avoid-moisture.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Anything wet inside your car can contribute to condensation, so make sure to keep your interior clean and dry.<\/figcaption><\/figure>\n\n\n\n<p>Although condensation occurs naturally, there are ways to prevent it. Here are some of the ways to avoid having too much moisture inside your car:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Keep Your Interior Dry<\/h3>\n\n\n\n<p>Anything wet inside your car can contribute to condensation, so make sure to keep your interior clean and dry. You can manually check if there&rsquo;s moisture in your car&rsquo;s upholstery.<\/p>\n\n\n\n<p>Don&rsquo;t forget to <a href=\"https:\/\/www.carparts.com\/blog\/floor-mat-maintenance-car-floor-mat-cleaners-and-upkeep-tips\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"inspect your floor mats\">inspect your floor mats<\/a> and carpets regularly. If your mats are wet, you can remove and dry them. This might also be a good time to clean your vehicle and get rid of any crumbs of dirt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use Your A\/C<\/h3>\n\n\n\n<p>Your car&rsquo;s a\/c system stabilizes the temperature inside your cabin, helping remove humidity inside your vehicle. You can activate your A\/C fan or blower to help remove moist air from your car.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Turn off Your A\/C Recirculation Valve<\/h3>\n\n\n\n<p>Use the A\/C recirculation valve only when it&rsquo;s needed. An A\/C recirculation valve allows the same air to recirculate inside the cabin instead of introducing outside air. It&rsquo;s helpful in maintaining a constant temperature, especially when it&rsquo;s humid outside.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/how-to-stop-rust-on-a-car-the-easy-way\/\" target=\"_self\" rel=\"dofollow\" class=\"u6a905b6368180083c308e544f8048e2b\"><style> .u6a905b6368180083c308e544f8048e2b { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u6a905b6368180083c308e544f8048e2b:active, .u6a905b6368180083c308e544f8048e2b:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u6a905b6368180083c308e544f8048e2b { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u6a905b6368180083c308e544f8048e2b .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u6a905b6368180083c308e544f8048e2b .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u6a905b6368180083c308e544f8048e2b:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">How to Stop Rust on a Car (The Easy Way)<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>However, recirculating the same air in your car can cause moisture to stay inside your cabin. You can turn off your A\/C recirculation valve to get new dry air from the outside.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Park In a Covered Area<\/h3>\n\n\n\n<p>If you often notice condensation in your car when parked, re-evaluate where you&rsquo;re parking your car. To avoid condensation, it&rsquo;s always a good idea to park in a covered area to keep the temperature inside your car more consistent.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Buy a Moisture Absorber or Dehumidifier<\/h3>\n\n\n\n<p>You can also shop for moisture absorbers and portable dehumidifiers online. Moisture absorbers can absorb and remove bad odor, so you can keep your interior smelling good.<\/p>\n\n\n\n<p>A portable dehumidifier can also take out moisture in the air. Simply place the device inside your vehicle and close your doors and windows.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use Baking Soda<\/h3>\n\n\n\n<p>If you don&rsquo;t like to spend money on aftermarket moisture absorbers, you can use baking soda as a natural moisture absorber. Simply open a box of baking soda and place it inside your car.<\/p>\n\n\n\n<p>Make sure to close all the doors and windows. Baking soda can absorb moisture and unwanted odor, so it works just like a commercial moisture absorber.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Leave Your Windows Open On Sunny Days<\/h3>\n\n\n\n<p>If you can, open your windows when it&rsquo;s sunny. This will allow the warm air from the outside to enter your ride&rsquo;s interior and reduce its moisture. Just make sure to roll the windows back up when you park your car.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Health Risks Related to Condensation<\/h2>\n\n\n\n<p>Condensation inside your cabin might seem like a small issue to deal with when you compare it with more pressing issues like an overheated engine.<\/p>\n\n\n\n<p>While this might be the case, it&rsquo;s important to keep in mind that the condition of your cabin is as important as the condition of other complex systems that help keep your car running.<\/p>\n\n\n\n<p>Mold can quickly form in damp areas. When left untreated, you&rsquo;ll most likely see black spots forming on seats, the cabin ceiling, and other damp surfaces.<\/p>\n\n\n\n<p>Other than being unsightly, mold can release spores into the air, which can be irritating to your airways.<\/p>\n\n\n\n<p>Breathing in too much mold can result in headaches and breathlessness.<\/p>\n\n\n\n<p>Dust mites are another product of condensation. These develop in damp areas where dust can build up, such as your carpets and seats.<\/p>\n\n\n\n<p>Once your cabin has been infiltrated with dust mites, you might feel like you&rsquo;re having an allergic reaction.<\/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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Condensation can cause moisture to build up inside your car. It&rsquo;s something you shouldn&rsquo;t overlook because moisture can lead to&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-causes-condensation-in-a-car\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":95014,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[53,3768],"tags":[3040,1380,1228],"ppma_author":[2607,2985],"class_list":{"0":"post-95012","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-features","8":"category-lifestyle","9":"tag-carpet-kit","10":"tag-door-seal","11":"tag-floor-mats-2","12":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Causes Condensation In a Car? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Read on to find out why condensation can build up inside the cabin and why you shouldn\u2019t leave it unaddressed.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/what-causes-condensation-in-a-car\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Causes Condensation In a Car? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Read on to find out why condensation can build up inside the cabin and why you shouldn\u2019t leave it unaddressed.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/what-causes-condensation-in-a-car\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2023-10-20T07:22:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-03-13T03:10:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/condensation-forming-inside-car-due-to-rain.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1330\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-causes-condensation-in-a-car\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-causes-condensation-in-a-car\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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