Skip the auto shop - Our mechanics make house calls

Q: AC automatic turns off

asked by on

Air condition does not cools fully. AC turns OFF automatically (Fan is still working) in between and then turns back ON even when temperature is set at lowest point. What needs to be fixed? Does it need Freon ?

My car has 124000 miles.
My car has an automatic transmission.

A: At 124000 miles, I would recommend having y...

At 124000 miles, I would recommend having your AC system recharged and your system pressures checked. Hopefully, a recharge will correct your problem, but it will be a good service to have for maintenance regardless.

You may have a bad AC compressor or expansion valve. In either case, it will not be inexpensive if a recharge doesn't fix your problem. My best recommendation would be to have a visual inspection of the AC and a full charge of refrigerant to test it properly and determine the source of the problem.

Also, keep in mind that AC systems naturally leak a few ounces of refrigerant a year, so there may not be a severe problem

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・Save up to 30%

Get a quote

What others are asking

Q: Squeaking brakes

Hi there: In most cases, squeaking brakes are caused by excessive brake dust that builds up on the caliper and rotor. Sometimes simply washing your brake rotors with a high pressure hose will brake-up the dust and fix this issue....

Q: Gear shift stuck in park

Typically when I have come across vehicles with problems similar to those of your Mercedes, it is usually due to a faulty brake switch. However, by adding water to the equation, this makes it a more serious concern. It is...

Q: Hood release not working

It sounds like the cable for the hood release has broken. These cables usually break at the connector under the dash. If this is the case, you can still open the hood; just find where the cable connects, and pull...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...