Skip the auto shop - Our mechanics make house calls

How Long Does an AC Compressor Relay Last?

AC compressor relay

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...


Related questions

Q: How do I replace the cabin filter?

To improve the quality and efficacy of your air conditioning system, you should replace the filter with some regularity. This can be done from inside your vehicle, with just a few steps: Open the glove box. Remove the damper...

Q: AC is leaking R-134A but no dye can be found anywhere

You should check the A/C evaporator drain with a black light and see if it shows dye leaking out of the drain. This would be the evaporator leaking. You had the evaporator replaced 6 years ago when the vehicle was...

Q: AC makes noise after putting on expansion valve

Hello. It sounds like your new compressor may be failing. Flushing the system is not enough when the compressor fails. When there is debris in the system, it gets stuck in the expansion valves, the condenser, and the accumulator. If...