A/C intermittently blows cold and hot air?

URRJAY`

MEMBER
2010 CHEVROLET TRAVERSE
100,000 MILES

Replaced A/C compressor. Refilled Freon. The A/C was working beautifully for about ten minutes while driving. Then it started blowing hot air. Next day while driving it was blowing hot air, then suddenly it blew cold air. Could the be the expansion valve, or is the compressor bad?

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

It could be the compressor but when the system stops working can you see the clutch engaged? I have seen the clutch coil go out and cause this problem. Please go over this guide:

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

If the clutch is engaged check the large A/C tube coming from the firewall to the compressor, it should be cold. If so, you have a temperature blend door actuator going out. Can I ask if the A/C stops working on both side of the dash, passenger and drivers' side?

Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/replace-air-conditioner-compressor

You will need this video as well:

https://youtu.be/4EqdrBVb0sY

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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