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.

A: It sounds like you have a leak in the syste...

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: Tire size

You can look in the driver's door or in the glove box cover for the tire size for your vehicle. If you change the tire size from the size the car came with you will change the transmission shifting, and...

Q: Car shakes when air turned on

There are a few components that could cause this abnormal shake such as the motor mounts, belt pulleys and spark plugs. The most common cause of the shake being from faulty motor mounts. I suggest having a trained mechanic, such...

Q: Leaking exhaust

In my experience, I have found that it is not uncommon for Jeeps to develop exhaust leaks over time. The most common exhaust leak can be found in the the gaskets between the various exhaust joints, which are held together...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...