Skip the auto shop - Our mechanics make house calls

Q: AC only working some of the time

asked by on

My AC is running well only some of the time. Otherwise it doesn't cool.

A: Hello! A low charge or malfunctioning relay...

Hello! A low charge or malfunctioning relay can cause an intermittent air conditioning failure. The are many components and failure points to the AC system and all should be checked for proper operation. Our mechanics here at YourMechanic know these systems - from the control head unit to the compressor clutch!

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: where is the combustor sensor located?

By combustor sensor, I am assuming you are referring to the air/fuel ratio sensors and these sensors are found along the vehicles exhaust plumbing. The way the air/fuel ratio sensors differ from the oxygen sensors as the air/fuel sensors are...

Q: Car runs great at first to no power

It sounds like you have an issue with one or more of the electronic engine components. Your vehicle's onboard computer can self-diagnose an issue and flag a code that represents the issue at hand. I recommend having a qualified technician...

Q: Click sound when press gas pedal

This sounds like potentially a valve train noise which is normal upon start up. As the car sits for a period of time the oil moves down to the bottom of the motor. Upon start up, the oil takes time...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.