How Long Does an AC Pressure Switch Last?

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Your car’s AC system uses refrigerant to help keep you cool and comfortable in hot weather. When the refrigerant is under low pressure, it takes the form of a gas, and when it is under high pressure, it transforms into a liquid. So, your AC system works under both high pressure and low pressure, and needs to be able to switch between the two in order to work. This is where our AC pressure switch comes in. It is, essentially, a safety feature that “trips,” or turns the system off, if there are any problems with pressure in the system.

There are any number of things that can cause the switch to trip, and not all of them involve the switch itself. If the level of refrigerant is too low or too high, for example, the switch could actually read incorrectly, and shut off the system. Most of the time, problems that appear to be with the AC pressure switch are problems elsewhere in the AC system. The switch itself is very stable, and should last a very long time.

The life of an AC pressure switch is measured in cycles, not miles or years. You can expect to get 50,000 cycles out of your AC pressure switch, which means that unless you are constantly turning your AC on and off, it will probably last you the life of your car.

However, like all electronic components, the AC switch could (rarely) fail, and if it does, then:

  • The AC compressor will not come on
  • The air conditioning will not work

Of course your air conditioning is not vital to your car’s operation, but just the same, it is quite important when it comes to your comfort. If you suspect that your AC pressure switch is faulty, you should have it checked out. A professional mechanic can diagnose problems with your air conditioning system, and if needed, replace the AC pressure switch.


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Bernie

50 years of experience
41 reviews
Bernie
50 years of experience
Honda Accord - Brake Pads Replacement (Rear) - Phoenixville, Pennsylvania
I specifically asked for Bernie to come back, since I was so pleased with the work he did on our other car. This time I got to meet Bernie personally. He is a kind family-man who exhibited the quiet confidence of someone you would expect with the 50 years of automotive experience that he has. I felt very comfortable giving him the key to my car. Two of my kids (ages two and four) came out to greet him, since they remembered him from his first visit. Bernie is great around kids and was very kind to my two-year old son who was trying to "help" Bernie do his job. Thanks again, Bernie!
Honda Odyssey - Brake Pads Replacement (Front, Rear) - Phoenixville, Pennsylvania
I was very pleased with Bernie's work, professionalism, and courteousness. Best brake job I have ever had, and I have had many done (and several done myself, but not on this vehicle). This was a maintenance appointment -- not a repair of something broken -- so I was surprised when the brakes felt so much better after Bernie did the work. You can really see the care he took with our vehicle when I examined everything after he was finished. Thanks, Bernie!

Daniel

9 years of experience
17 reviews
Daniel
9 years of experience
Hyundai Sonata - Brake Pads Replacement (Front, Rear) - Sacramento, California
Awesome customer service. On time and answered my questions with patience. Listened to my concerns and made helpful suggestions. Seemed very knowledgeable and experienced. I will be glad to request him again. Thank you!!

Breck

18 years of experience
532 reviews
Breck
18 years of experience
Toyota RAV4 - Brake Pads Replacement (Rear) - Conroe, Texas
Breck was awesome! He called ahead of time and asked if he could arrive early. He was friendly and easy to talk to. He made me feel comfortable with the service he was going to provide and explained things clearly to me. He smiled and made this experience a good one. I will absolutely be booking future appointments with Breck and I will recommend him and Your Mechanic services to others I know. Thank you!

Brian

19 years of experience
101 reviews
Brian
19 years of experience
BMW Z4 - Brake Pads Replacement (Rear) - Phoenix, Arizona
Brian knows what he is doing and I am so happy yourmechanic.com suggested him for my Z4 car inspection prior to purchasing and even happier he was available to perform my 1st service on the vehicle I purchased. His knowledge on the brand gave him ability to to an in depth inspection and he communicated very well informing me what to prepare for in ownership of my BMW. When he came to perform maintenance on my vehicle he shared so many tips with me. I will absolutely be having Brian come back out when I need future servicing on my car.

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