How Long Does an AC Compressor Relay Last?

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Your car’s air conditioning system needs to be able to pressurize refrigerant in order to operate. The AC compressor relay is an electronic component that turns your AC compressor off and on. Without it, the compressor will not work, no matter how good the other components are, because no electricity is being delivered to the compressor.

How long your AC compressor relay will last depends mainly on how often you use your air conditioning. The life of the compressor relay is measured in cycles, not miles – in other words, how many times it is turned on and off. Most are rated for about 50,000 cycles. For the typical driver, this usually translates to about ten years’ worth of driving. Of course, you have to keep in mind that the AC compressor relay is an electronic component, and as such, is vulnerable to damage from corrosion and dirt. If a lot of your driving takes place on dirt roads, or if you live in an area where salt and sand are used on the roads during the winter, you might have to replace the relay sooner.

Signs that your AC compressor relay needs to be replaced include:

  • Compressor fails to turn on
  • No cool air

Of course, this is not something that you need to deal with immediately, if you don’t mind living without air conditioning. However, if you are experiencing problems with the air conditioning in your car, an expert mechanic can provide a diagnosis, and if necessary, replace the AC compressor relay.


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Richard

15 years of experience
60 reviews
Richard
15 years of experience
Ford F-150 - Brake Pads Replacement (Front, Rear) - Fremont, California
Excellent communicator, walked me through the fixes and even gave me an idea of what might be next on the fix list.
Dodge Grand Caravan - Brake Pads Replacement (Front, Rear) - Union City, California
quickly diagnosed the problem but knew it would take longer than appt time to fix. since we had appt the next day for brakes he rearranged his schedule to do it all together the next day. very knowledgeable, friendly, and professional.

Tung

14 years of experience
285 reviews
Tung
14 years of experience
Hyundai Elantra - Brake Pads Replacement (Rear) - Mableton, Georgia
Very detailed and customer service oriented. Did an amazing job fixing my back brakes and even set-up a schedule of future appointments for my car!
Ram 1500 - Brake Pads Replacement (Front) - Marietta, Georgia
Tung showed up on time and was very friendly. Changed my brake pads in about 30 minutes and gave me recommendations on when to change the rear pads. Will ask for him by name next time.

Horus

9 years of experience
103 reviews
Horus
9 years of experience
Land Rover Range Rover - Brake Pads Replacement (Front, Rear) - San Antonio, Texas
Horace worked on my Land Rover today. Showed up on time and was professional and courteous. Replaced front and rear break pads. Great job!

Juan

11 years of experience
37 reviews
Juan
11 years of experience
Dodge Avenger - Brake Pads Replacement (Front) - Mountain House, California
Was very thorough in explaining the condition of the car and how the repairs will impact it’s service.

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