Skip the auto shop - Our mechanics make house calls

Q: AC has stopped working

asked by on

The AC has stopped working. The blower and air diverter work, and the AC fuse and relay checked-out okay. I tried adding Freon, but the pressure reading was high. Also, I can't hear the AC clutch engage.

A: Based on your description, I believe your a...

Based on your description, I believe your air conditioning system may be overcharged with refrigerant. Most systems have a high pressure cut-off switch for the compressor to prevent a blowout of ozone-depleting gas. If the pressure in your system is too high, the compressor clutch will not engage by design, which is why you do not hear it kick back. I would recommend having your vehicle’s air conditioning system inspected; have your AC evacuated, pulled into a deep vacuum, then recharged with the correct amount of refrigerant by a certified mechanic. At this point your air conditioning system should work as it as intended.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: AC doesn't work, compressor still works

Hello. If there is no air blowing out of the vents then the compressor is typically not the problem. It is common for the blower motor to fail and cause this as well as the blower resistor. Both of these...

Q: Is there a way to check my computer to see if it's faulty or not?

Your computer is located inside the car and would need to be tested by scanning the computer to see if it is storing fault codes for an internal problem or an indication to some engine sensors that may have been...

Q: Car jerks forward slightly everytime I hit 19 mph

Hello, and thank you for writing in. The misfire needs to be the focus of our attention. If you had moisture on the spark plugs and white smoke, then there is some kind of coolant leak. This fouling on the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...