Skip the auto shop - Our mechanics make house calls

Symptoms of a Bad or Failing Refrigerant Pressure Switch (Sensor)

refrigerant pressure sensor

Bad or Failing Refrigerant Pressure Switch (Sensor) Inspection

by a top-rated mechanic at your home or office

The refrigerant pressure switch monitors the pressure in the air conditioning system to ensure it is operating properly. If the pressure gets too low, the switch turns off the air conditioning system. This saves the compressor from running without lubrication and sends a signal that there is a error in the AC system. There are a few symptoms you should look for if you suspect a bad or failing refrigerant pressure switch:

HAVE SYMPTOMS OF CAR TROUBLE?
Get an $80 diagnostic
by a top-rated mechanic at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

1. Air conditioning works intermittently

When you turn the air conditioning on, does it seem to cool the vehicle down then stop working? Or does it not work all of the time, just at random times? This means the switch may not be working correctly or have an intermittent failure. As soon as this happens, contact a professional mechanic to have your refrigerant pressure switch replaced so you can be comfortable in your vehicle.

2. Air conditioning not working properly

The air conditioning in your vehicle may not seem to get cool enough, causing you to be uncomfortable on a hot day. This can be caused by many factors, and one is a failing refrigerant pressure switch sensor. In hot summer months this can be a safety concern if the outside temperature gets too hot. A mechanic can properly diagnose the issue, whether it is the switch or a low charge in the refrigerant.

HAVE SYMPTOMS OF CAR TROUBLE?
Get your car fixed at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

3. Noise coming from the AC system

If a high pitched sound comes from the air conditioning system when it is on, this is a sign the pressure switch may be going bad. The switch could be rattling against different parts in the engine compartment, so it is important to have this looked at before other parts are damaged.

4. Blowing warm air

If no cool air comes out at all, it could be a switch problem or another issue within the air conditioning system such as low refrigerant. A mechanic will check the pressure in the system to ensure it has the correct reading. If it is too high or too low, the sensor is most likely failing. In addition, they can read any codes the computer puts out to positively diagnose the problem.

If your air conditioner is not working properly, noises are coming from the system, or it is blowing warm air, contact a professional mechanic. The refrigerant pressure sensor switch is an important part of keeping you comfortable on hot summer days so it should be repaired as soon as possible.

YourMechanic makes getting repairs to your refrigerant pressure sensor easy by coming to your home or office to diagnose or fix issues. You can book a service online 24/7. YourMechanic’s qualified technicians are also available for any questions that may arise.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
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 to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...


Related questions

Q: Loud bog noise will not excellerate with no codes in computer

Just because the computer does not have any codes does not mean one of the sensors is not reading correctly. If you are using an oil bath type air filter, it may have contaminated the mass air flow sensor with...

Q: Car cutting off while driving

Multiple issues here. The strut mounts require special tools which are not an on-site repair. The water pump requires timing belt replacement as well (which is intensive). The air conditioner also requires special tools where the repairs may require a...

Q: My car wont start after driving it for an hour, it will just crank and then start after 30 mins

The engine is very common to have an intermittent cam or crankshaft sensor. You can have the computer scanned for codes to one of the sensors and replace them as codes are stored. If you have codes for both then...