2007 Cobalt LT 2.2 - Air Conditioning Power Issue - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 16 (permalink) Old 06-08-2013, 04:05 PM Thread Starter
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2007 Cobalt LT 2.2 - Air Conditioning Power Issue

I searched around and found this site, great for helpful tips and Coby7 offered some solid advice about an A/C unit last summer.
sorry I don't mean to pick on you; here's my issue,...
I have 2007 Cobalt LT A/C isn't working.
-cabin fans work but no cold air
engine fuse panel has a 10a fuse, its fine...but there is no power to it (checked this morning with test light) when it is bypassed with a jumper it does kick the A/C Blower fan on.
As far as leaks and recharge kit, I haven't gone that far because of this issue. I have checked the passenger side cabin fuse panel and all the fuses are fine, but i'm wondering about the "switch boxes" that are also in the same panel/panels.
I don't really have the cash to have a GM tech look it over, and i have access to a very large supply of tools (Addiyr Repair .com) and knowledge. can you point me down the correct trouble shooting path for this electrical A/C concern please.
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post #2 of 16 (permalink) Old 06-10-2013, 06:42 PM Thread Starter
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maybe its my clear and well explained question..

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post #3 of 16 (permalink) Old 06-10-2013, 07:58 PM
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I thought I answered this. Where did my answer go. lol

Did you try pulling and cleaning the fuse tabs for HVAC?

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post #4 of 16 (permalink) Old 06-12-2013, 01:21 PM Thread Starter
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Hvac

The HVAC switch (#30 fuse/Switch) from the interior fuse panel I did swap out and then tested but to no avail, it seems to be working fine but it is very hard to get a test light onto the tester switch box leads.
[IMG][/IMG]
in this image, I have no power to either fuse A/C Clutch or Air Sol/ Aftercool,
I was wondering if power runs through their switches (on the left in the picture) before the fuse or after, and then....if a switch in the cabin is blown will that prevent power from reaching the engine fuse panel? or will power run in the other direction?
My car was T-boned on the driver side before I owned it (I bought it as an ICBC rebuild in Jan. 2013), so i suppose the wire could be completely severed somewhere.
I will pull the connections and sand them a little on all switches etc this afternoon....anything else before I give up and try to track all the wires from harness to harness? (which would really...really ....really suck ass)

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post #5 of 16 (permalink) Old 06-12-2013, 06:33 PM
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---------- Post added at 09:33 PM ---------- Previous post was at 09:06 PM ----------


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post #6 of 16 (permalink) Old 06-12-2013, 10:49 PM
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My 05 cobalt ls had the same problem. Took it to the local shop and the recharged and evacuated the lines or something and it works great now. Cost me about 90 total

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post #7 of 16 (permalink) Old 06-15-2013, 12:32 PM Thread Starter
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Thanks for the images,
very helpful Coby7
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post #8 of 16 (permalink) Old 06-20-2013, 01:54 PM Thread Starter
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ahh, 15 again...

I feel all confused, frustrated and unsatisfied....any other pointers Coby7?
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post #9 of 16 (permalink) Old 06-20-2013, 02:57 PM
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What have you checked so far?

---------- Post added at 05:57 PM ---------- Previous post was at 05:53 PM ----------

Did You check the pressure in the A/C core at all? If everything works but you have no cold air chances are you sprung a refrigerant leak. Compressor Clutch won't come on if you don't have a predetermined amount of pressure in the line or too much pressure. Doubt that you have too much because cooling fan would run as soon as you would turn the key on.

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post #10 of 16 (permalink) Old 06-20-2013, 03:22 PM
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Quote:
Originally Posted by Coby7 View Post
What have you checked so far?

---------- Post added at 05:57 PM ---------- Previous post was at 05:53 PM ----------

Did You check the pressure in the A/C core at all? If everything works but you have no cold air chances are you sprung a refrigerant leak. Compressor Clutch won't come on if you don't have a predetermined amount of pressure in the line or too much pressure. Doubt that you have too much because cooling fan would run as soon as you would turn the key on.
the cooling fan wood? Didn't know there was wood there lol. he said if he jumps it it turns on right? Is the clutch engaging at all?

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Last edited by Coby7; 06-20-2013 at 03:33 PM.
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