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A/C Pressostat Customer Reviews

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A/C Pressostat Guides

Tips on Buying an A/C Pressostat

An A/C low pressure switch or A/C pressostat is a switch that regulates the cool air that goes into your vehicle's passenger cabin in order to keep everyone comfortable and cool. It works in tandem with the compressor, which is the mechanism that compresses the refrigerant before it goes to the condenser. If the air flow is too high or low pressure, the A/C won't function right.

The Dos and Don'ts When Buying an A/C Pressostat

Essentially, the pressostat acts as a failsafe that shuts off the system if the flow is too fast or slow to keep further damage. At any rate, when buying an A/C pressostat, there are some things you should do and some things you shouldn't do. Here's a breakdown on that.


  • Do make sure you got proper pressostat fitment for your vehicle. You'll get better performance from the right fit. Online solutions provide a myriad of options for you to choose from, ranging from aftermarket OE-reengineered offerings to universal-fit, non-vehicle-specific products.
  • As much as possible get a duplicate replacement pressostat from the Internet by knowing its identifying serial numbers. The numbers you should be on the lookout for in order to get an OEM-grade or outright OEM part is is the part number and the manufacturer number on top of the make and model of your car.
  • If you've instead gotten a nonspecific pressure switch, then keep that 30-day money back guarantee handy in case the inlet/outlet fittings and the threads of the switch are slightly different from each other. Usually, it's best to go OEM.
  • When buying a refurbished pressostat, it's recommended that you avoid any remanufactured switches made of substandard materials and only go with high-quality switches made of premium-grade stainless steel or aluminum construction for prolonged services.
  • Check the specs in order to get a good pressostat from the Internet. See if there's a match in terms of product dimensions and item weight. Otherwise, check out the specs of supposed non-vehicle-specific pressure switches to make sure they're close to the features of the component you're replacing.


  • DON'T delay when buying a new replacement pressostat. As soon as the switch is found broken or worn out, it should be replaced ASAP to avoid secondary damage that could cost you even more in additional repairs.
  • DON'T buy the first replacement component you find online. Instead, read the reviews, check out the ratings, and confirm with your mechanic if it's the best possible part for your A/C needs.
  • DON'T buy a used pressostatwithout checking out their remanufacturing origins first. There are loads of stolen scrap pressure switches that are sold to the market, often times with damage.
  • DON'T accept a used pressure switch with signs of damage regardless of how cheap it is. If it's already worn down or broken, disregard it and buy something in the best condition possible (preferably something brand new).

In Conclusion

Just like other small components that work together under your hood, the A/C pressostat is an oftentimes overlooked switch... until it gets broken. Once it breaks down, you'll literally feel the heat for sure. Remember, this part is the safety mechanism you can depend on when your A/C compressor malfunctions, so get the right fitment and part post-haste when it's damaged.

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