Skip the auto shop - Our mechanics make house calls

How Long Does an AC Pressure Switch Last?

AC pressure switch

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.

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

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Long Does a Fuel Filler Neck Last?
Getting gas from the pump to your gas tank is the only way to keep a car going. The fuel filler neck is a metal tube that is welded to the...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...


Related questions

Q: Car stalling when turning on the AC.

A stalling vehicle when the AC or Defroster is activate indicates a problem with the compressor. It is either seized/hard to rotate or the AC refrigerant is overcharged preventing the compressor from turning. This will also put increased load on...

Q: Car hard to steer, making loud noises, and the AC is blowing warm

The screeching noise may be due to a fault in one of the driven elements in the serpentine drive belt "circuit". There are both devices (e.g., alternator, A/C) and pulleys in that circuit. Every driven element in the circuit has...

Q: A/C will not put out cold air.

Hi and thank you for contacting YourMechanic. These AC system are very sensitive and if the pressure isn't tested with the correct gauge and gives and incorrect reading, this will affect how well the system works. I highly recommend that...