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

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 not starting up

Hi, the first thing to check out is the battery. Batteries tend to fail at the 5 year mark so if the battery is around that age it may not be able to hold a charge. You can try jumpstarting...

Q: AC not working

Hi, thanks for your question. I'd be happy to help. The AC and oil system on a Nissan Armada are not linked in any way mechanically. So, the likelihood of the dealer mechanic doing something to cause this issue is...

Q: Leaking diesel

Hey there, thanks for writing in. There should not be any way for diesel fuel to work its way into the transmission in any case. If you need to have the leak detected and fixed, a certified technician from YourMechanic...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...