Skip the auto shop - Our mechanics make house calls

Q: AC isn't working !!

asked by on

I have a 2010 Chevy Cobalt. Ac wasn't getting cold, so I change the Expansion Vavles and in line filter, then recharged system. Ac was cool parked for 5 mins then drove it around and it got hot again! What's wrong?!

My car has 129000 miles.
My car has an automatic transmission.

It sounds like you have a leak in the system. If you charged the system with leak detector style refrigerant, you can use a black light to try and find the leak. The green dye in the leak detector fluid glows brightly when a black light is used. Be sure to check all connections and the compressor for signs of leaking refrigerant. If you need help with this concern, I suggest having a certified technician, like one from YourMechanic, conduct tests to determine the exact cause of your A/C concern.

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: Car is clicking and not starting. battery is fine what could be the problem?

It sounds like you may have a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator charges the battery while the engine runs by generating amperage and recharging the battery while the engine turns...

Q: The AC/heat blower fan - 1997 Dodge Avenger

Hey there. The most common failure where the fan only blows on high is the blower motor resistor. It is possible the blower motor switch is the culprit, and it can be replaced separate of the control module. Diagnosing...

Q: Car leaking gas

A fuel leak can be a very dangerous situation. Your car needs to be inspected and fixed as soon as possible. Fuel leaks can come from a cracked fuel tank or damage on any of the lines that run the...

Related articles

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...
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.