A/C Blowing Warm Air While Moving, Cold Air While Idling
Thread Starter
CF Beginner
Joined: May 2015
Posts: 2
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A/C Blowing Warm Air While Moving, Cold Air While Idling
Hello,
I've got a 2008 Cobalt LS 2.0L. Recently, I started noticing the air conditioning was blowing just cool, sometimes even warm air. I also noticed the coolant temperature reading in the dash was reading "---". I replaced the thermostat (didn't fix the problem) and the coolant temperature sensor (this fixed the reading issue).
The Issue
It seems pretty consistent that when I'm idling, the a/c blows pretty cold - about as cold as I'd expect. However, when moving, even at low speeds, the a/c blows cool to warm air. This happens regardless of if I am in "fresh air" or "recirculate" mode and whether I'm going 15 or 65 MPH.
I've also noticed that what I think is the a/c compressor kicking on and off constantly; it never fully stays on when the a/c is turned on - it's usually off/on/off/on every 3 seconds or so. Here's a clip of what this sounds like.
Steps Taken
I've tried adding some R-134a, but that did not fix the issue
Looking for Help
If anyone has any advice on what to look for, or, if I need to take it somewhere, where a decent place to take it (I'm in Nashville, TN). I am fairly mechanically inclined & I have a decent assortment of tools, so I wouldn't be against trying to fix the problem myself if it's possible.
I've got a 2008 Cobalt LS 2.0L. Recently, I started noticing the air conditioning was blowing just cool, sometimes even warm air. I also noticed the coolant temperature reading in the dash was reading "---". I replaced the thermostat (didn't fix the problem) and the coolant temperature sensor (this fixed the reading issue).
The Issue
It seems pretty consistent that when I'm idling, the a/c blows pretty cold - about as cold as I'd expect. However, when moving, even at low speeds, the a/c blows cool to warm air. This happens regardless of if I am in "fresh air" or "recirculate" mode and whether I'm going 15 or 65 MPH.
I've also noticed that what I think is the a/c compressor kicking on and off constantly; it never fully stays on when the a/c is turned on - it's usually off/on/off/on every 3 seconds or so. Here's a clip of what this sounds like.
Steps Taken
I've tried adding some R-134a, but that did not fix the issue
Looking for Help
If anyone has any advice on what to look for, or, if I need to take it somewhere, where a decent place to take it (I'm in Nashville, TN). I am fairly mechanically inclined & I have a decent assortment of tools, so I wouldn't be against trying to fix the problem myself if it's possible.
Last edited by motoxer4533; May 9, 2015 at 8:03 AM. Reason: Added audio
CF Beginner
Joined: Feb 2016
Posts: 2
Likes: 0
A/c
I have a 07 Tahoe and I'm having a problem with the a/c. The rear a/c blows out good and I can control it from the front controls. But the front a/c will not blowing at all. Defrost, the vents, nor the floor. Any solutions will be greatly appreciated. Thanks in advance.
Official GM Rep
Joined: Mar 2010
Posts: 4,163
Likes: 27
From: Global Headquarters in Detroit, MI
Have you brought this to the dealership's attention? They will be in the best position to provide you with a possible resolution if you choose to work with them. If you need the additional assistance, we would be happy to get in touch with them. Feel free to send us a private message along with your VIN, current mileage, contact information and preferred dealership. We look forward to your response.
Patsy G
Chevrolet Customer Care
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