AC doesn't turn on anymore? - Pontiac G6 Forum
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post #1 of 23 (permalink) Old 07-08-2011, 04:30 PM Thread Starter
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AC doesn't turn on anymore?

Hey everyone, seems like one issue after another with this car. Wonderful.

Driving a 2009 G6 GT 3.5L. AC worked fine this morning from what I felt (didn't really have it on, had windows going) but definitely worked yesterday no problems. Today, I go to turn it on and it's just blowing warm air. I don't even hear the compressor turn on or anything.

I think I checked the right fuses (Fuse #1 in the engine compartment fuse box right next to the battery?), but maybe I'm missing more or didn't find the right fuse. I'm hoping that it's a fuse issue as everything was working fine yesterday.

Does anyone have any ideas what I should look at before I shell out another crazy amount of $$$ for this car?

Ian
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post #2 of 23 (permalink) Old 07-08-2011, 06:57 PM
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Quote:
Originally Posted by IanG View Post
Hey everyone, seems like one issue after another with this car. Wonderful.

Driving a 2009 G6 GT 3.5L. AC worked fine this morning from what I felt (didn't really have it on, had windows going) but definitely worked yesterday no problems. Today, I go to turn it on and it's just blowing warm air. I don't even hear the compressor turn on or anything.

I think I checked the right fuses (Fuse #1 in the engine compartment fuse box right next to the battery?), but maybe I'm missing more or didn't find the right fuse. I'm hoping that it's a fuse issue as everything was working fine yesterday.

Does anyone have any ideas what I should look at before I shell out another crazy amount of $$$ for this car?

Ian
Fuse 1 is the AC clutch fuse yes. Now find the AC clutch relay (34) in the engine compartment fuse box & swap it out with another identical one (there are several 8866s in there) temporarily to see if that fixes it. If no joy swap them back & report back here.




Last edited by greenman; 07-08-2011 at 07:59 PM.
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post #3 of 23 (permalink) Old 07-08-2011, 07:53 PM Thread Starter
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Fuse 1 is the AC clutch fuse right. Now find the AC clutch relay (34) in the engine compartment fuse box & swap it out with another identical one (there are several 8866s in there) temporarily to see if that fixes it. If no joy swap them back & report back here.
Nope, didn't seem to fix the issue.

Anything else I should look at? I still didn't hear anything kick on when I pressed the AC button. The light is lit up but it's still blowing warm air.

Edit: And yes, Fuse 1 is the AC Clutch Fuse.

Last edited by IanG; 07-08-2011 at 07:56 PM.
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post #4 of 23 (permalink) Old 07-08-2011, 08:07 PM
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Nope, didn't seem to fix the issue.

Anything else I should look at? I still didn't hear anything kick on when I pressed the AC button. The light is lit up but it's still blowing warm air.

Edit: And yes, Fuse 1 is the AC Clutch Fuse.
Is the AC clutch engaging the compressor?



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post #5 of 23 (permalink) Old 07-08-2011, 08:08 PM Thread Starter
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No, I don't believe I hear the compressor turning on at all. I should be able to hear it with the car idling, correct? If so, I don't hear any change when I press the AC button.
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post #6 of 23 (permalink) Old 07-08-2011, 08:30 PM
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No, I don't believe I hear the compressor turning on at all. I should be able to hear it with the car idling, correct? If so, I don't hear any change when I press the AC button.
Grab a flashlight & shine it down on the compressor & see if its turning with A/C ON.




Last edited by greenman; 07-22-2011 at 08:44 PM.
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post #7 of 23 (permalink) Old 07-08-2011, 08:45 PM Thread Starter
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Where would I look in the engine compartment and how can I tell if it's turning on or off?
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post #8 of 23 (permalink) Old 07-08-2011, 08:59 PM
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Is the temperature gauge working?
My G6 had a bad thermostat and wouldn't come up to temp .The computer then shuts off the a/c and the temp gauge stops working.
Just an idea.
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post #9 of 23 (permalink) Old 07-08-2011, 09:23 PM Thread Starter
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Yeah, the temperature gauge looked like it was working fine. Needle was at the middle of the gauge or so (forget what temperature that is).
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post #10 of 23 (permalink) Old 07-09-2011, 11:35 AM
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Is the temperature gauge working?
My G6 had a bad thermostat and wouldn't come up to temp .The computer then shuts off the a/c and the temp gauge stops working.
Just an idea.
I know there is a high coolant temperature AC clutch disable (237deg) but I'm not aware of a low coolant temperature clutch disable. It is true that a lack of input signal from the ECT will disable the AC clutch. It follows that an intermittent ECT signal will produce an intermittent AC clutch. A lack of ECT input will also result in the cluster gauge zeroing out.



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post #11 of 23 (permalink) Old 07-09-2011, 11:51 AM Thread Starter
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By the way guys, where can I locate the AC Compressor in the engine bay? I'm having one hell of a time finding it... Pics would be appreciated!
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post #12 of 23 (permalink) Old 07-09-2011, 12:04 PM
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By the way guys, where can I locate the AC Compressor in the engine bay? I'm having one hell of a time finding it... Pics would be appreciated!
Front most on the bottom. I'm guessing it's not turning. Several possible reasons for that.




Last edited by greenman; 07-22-2011 at 08:44 PM.
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post #13 of 23 (permalink) Old 07-09-2011, 02:01 PM Thread Starter
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Front most on the bottom. I'm guessing it's not cycling. Several possible reasons for that.
Anything I should try? Or are all reasons only able to be fixed by a shop?

Edit: It might sound like I don't know anything, but I'm the type of person where if you tell me what needs to happen, I'll figure it out without breaking everything :P
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post #14 of 23 (permalink) Old 07-09-2011, 02:07 PM
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Anything I should try? Or are all reasons only able to be fixed by a shop?

Edit: It might sound like I don't know anything, but I'm the type of person where if you tell me what needs to happen, I'll figure it out without breaking everything :P
Is it turning? If you can't tell me that then we're done.




Last edited by greenman; 07-22-2011 at 08:45 PM.
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post #15 of 23 (permalink) Old 07-09-2011, 05:29 PM Thread Starter
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Is it cycling? If you can't tell me that then we're done.
Let me go check on that quickly. Not sure why my brain didn't process that when I was out there.
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