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Old 07-01-2013, 11:43 AM   #18
JackGas
 
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Still have not solved this problem

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Originally Posted by TLSTWIN View Post
I recently am having a very similar issue. A/C works great while moving. As soon as I stop at a light or stop sign, or just sitting, it starts blowing warmer and warmer air.

What did you find out?
This problem still exist, I tried changing the A/C/Clutch relay, $16.00 part, but had no change to the condition, I have monitored the Engine coolant temp while driving, and on the hottest of days, it normally stays between 190-198 while moving, when I stop it creeps up to around 204 or so. Like you mentioned, it seems to be more prevalent with stops in traffic. A lot of stop and go in the city causes this to happen. Recently I was in a Four mile back-up at the tunnel on a 99 degree day, air was blowing cold when I hit the back up, but shortly started blowing hot. The jam took over an hour to clear, so sitting in that heat, even though the coolant temp never went over 206, After traffic cleared and I hit normal speeds with moving traffic the cold air never came back over the 25 mile ride home from there. It seems like the lower the amount of time I am stopped or slow moving the lower amount of time it takes for the air conditioning to turn cold again. Like someone said, in another post here, I no longer think it has anything to do with my cooling fans. I am wondering though, is there a function built in to the ECM that will disengage the A/C clutch if it gets too hot? I have not yet monitored the temperature of the engine compartment, but I really think this might have something to do with it. The same day that I sat in the four mile back-up, I parked the car in the garage for a few hours (garage temp in low 90's) after I got home, and then around 8 o'clock had to run out for dinner. When I first got in the car the a/c was still blowing hot. outside temp still in the upper 80's about ten minutes into the drive the A/C came back on blowing Ice Cold. I would really like to get this figured out. It really sucks sweating my but off in a 3 piece suit. Does anyone have the schematics for the A/C circuit so I can look at the logics that control the power provided to the A/C Clutch Relay.

Any help or suggestions anyone has, would be greatly appreciated.

JackGas
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Old 07-01-2013, 08:53 PM   #19
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Part of your problem might be jumping from dealership to dealership. None of them have heard or seen the same problem.
I understand your frustration, but threats will only shut down any help they are willing to offer. Kill them with kindness, you can be firm, but no reason to be rude. I am not saying you did, just a little helpful advice.
Well I moved so the last change was needed,unless I drive 300 miles to the dealership and back. This problem has been going on far to long. So far 2 years and counting. Ever since day 2(bought it brand new in 06/11) the AC had problems. First it was no refridgerant,then the condensor,then the compressor. Then a seal. Now the evap core! Right now this dealership has had my car for 8 days. I'm pretty sure it doesn't take that long to change the core.
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Old 07-01-2013, 09:32 PM   #20
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Originally Posted by 2011 RJT View Post
Well I moved so the last change was needed,unless I drive 300 miles to the dealership and back. This problem has been going on far to long. So far 2 years and counting. Ever since day 2(bought it brand new in 06/11) the AC had problems. First it was no refridgerant,then the condensor,then the compressor. Then a seal. Now the evap core! Right now this dealership has had my car for 8 days. I'm pretty sure it doesn't take that long to change the core.
ok, makes sense on the move...... the rest suck and makes no sense.

But I must say in GM's defense..... this is a pretty rare occasion when you look at how many cars have been sold. That doesn't make it any easier to swallow, or make it right, I really hope you get it resolved.

My car is 4yrs old as of april, I have had no issues with my car until now. it is a minor issue at this point.

I also have to find the thread about the airbag cracks in the horn and dash now..... the seam in my horn airbag is showing through. my dash is ok, but the horn shows the seam.
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Old 07-01-2013, 10:35 PM   #21
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Well,the dealership I bought the car from sold me the car with no refidge in it. They filled it. A week later,hot air again. They had the car for a week. Said they put dye in it,couldn't find a thing. Said 70 degree air is normal for the AC to blow.
After that fiasco,took it to a different dealer. They found the problem in a 1/2 hour. Cracked weld on the condensor. Condensor replaced (took 3 days to get). A month later,warm air again. Took it back,they said compressor bad. Replaced that. (again 3 more down days). No problems due to winter,but last summer towards end of summer,back to warm. Moved and took it to new dealer. Some kind of seal. Replaced. Fine until this spring. Again another seal. Replaced. A month later,warm again. Took it in and after 5 hours,they said evap core.
Told me to bring car in Monday so they can take windshield out and dash and prep for part which was to be there Tuesday. Get a call Thursday,said they ordered wrong part. I said,you should have known that Tuesday. Well they were to overnight the part Thursday. Would be there before 10am Friday. Well,no car yet. Its now Monday. VERY,VERY trying. Feel they aren't being very honest about whats going on. Meanwhile I'm paying for insurance on a rental because the dealership won't.
Bottom line is every car will have problems. I get that. But after 2 yrs,my AC problem still isn't fixed. Not to mention the time to sit a dealership,time without car,etc. I just want the damn thing fixed and correctly,just not on the installment plan.


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ok, makes sense on the move...... the rest suck and makes no sense.

But I must say in GM's defense..... this is a pretty rare occasion when you look at how many cars have been sold. That doesn't make it any easier to swallow, or make it right, I really hope you get it resolved.

My car is 4yrs old as of april, I have had no issues with my car until now. it is a minor issue at this point.

I also have to find the thread about the airbag cracks in the horn and dash now..... the seam in my horn airbag is showing through. my dash is ok, but the horn shows the seam.
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Old 07-01-2013, 10:44 PM   #22
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Quote:
Originally Posted by 2011 RJT View Post
Well,the dealership I bought the car from sold me the car with no refidge in it. They filled it. A week later,hot air again. They had the car for a week. Said they put dye in it,couldn't find a thing. Said 70 degree air is normal for the AC to blow.
After that fiasco,took it to a different dealer. They found the problem in a 1/2 hour. Cracked weld on the condensor. Condensor replaced (took 3 days to get). A month later,warm air again. Took it back,they said compressor bad. Replaced that. (again 3 more down days). No problems due to winter,but last summer towards end of summer,back to warm. Moved and took it to new dealer. Some kind of seal. Replaced. Fine until this spring. Again another seal. Replaced. A month later,warm again. Took it in and after 5 hours,they said evap core.
Told me to bring car in Monday so they can take windshield out and dash and prep for part which was to be there Tuesday. Get a call Thursday,said they ordered wrong part. I said,you should have known that Tuesday. Well they were to overnight the part Thursday. Would be there before 10am Friday. Well,no car yet. Its now Monday. VERY,VERY trying. Feel they aren't being very honest about whats going on. Meanwhile I'm paying for insurance on a rental because the dealership won't.
Bottom line is every car will have problems. I get that. But after 2 yrs,my AC problem still isn't fixed. Not to mention the time to sit a dealership,time without car,etc. I just want the damn thing fixed and correctly,just not on the installment plan.
Some dealers should never be allowed to sell cars. I am fortunate to deal with a good Dealership. They aren't perfect, but they do try.

I am not sure why dealerships get all worked up about warranty work. It doesn't cost them any money. GM pays for it. Now if the dealership screws it up, then they are on the hook.

I never could understand why most dealerships get all defensive on warranty issues.
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Old 07-02-2013, 12:58 PM   #23
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Well, they said mine was real low on refrigerant. they also put die in so we could see if it was leaking anywhere. so far so good.
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Old 07-02-2013, 01:31 PM   #24
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Same as mine on two different occasions. Coolant must be going somewhere. Hope they find it. Also,I'm supposed to pick up my car today after 9 days. They are waiting for the new glass to come and be installed since they broke the original glass.


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Well, they said mine was real low on refrigerant. they also put die in so we could see if it was leaking anywhere. so far so good.
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Old 07-02-2013, 05:12 PM   #25
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Well,went by there to see what was up with my car. They said it has to sit overnight for the windshield to set up properly.
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Old 07-02-2013, 07:30 PM   #26
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Same as mine on two different occasions. Coolant must be going somewhere. Hope they find it.
That was the first question I asked them. Is there a leak? That is why they put the die in, to check.

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Well,went by there to see what was up with my car. They said it has to sit overnight for the windshield to set up properly.
DOH
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Old 07-03-2013, 11:21 AM   #27
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I can't win! went to pick up car @8am. Got there,no inspection. Waited for 2 hours so they could free up a tech. Get in car,red light on onstar is flashing. Wait another hour. Antenna not properly plugged in!. Get home to clean the filthy windows,smal hole in headliner where it meets side pillar(I think its called A pillar)! both A pillar covers are all marred up!!!! Never taking my car back there. Have a call into GM customer care now.
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Old 07-03-2013, 03:48 PM   #28
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here's the damage.... First 2 are pillar and small hole in liner. You can see the smooth places i the pillar which are textured. Looks like he used something metal. The oth 2 are the tail light. They said they had to change a bulb. I guess they tried from the from and acratched the top part of the bezel and the tint itself. The last is the plastic piece on top of the tailight,the part you see when you open the trunk.
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Old 07-03-2013, 04:32 PM   #29
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does anyone know the temp of the air from the AC at idle?
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Old 07-03-2013, 04:57 PM   #30
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for a/c to work efficiently, a fresh supply of air needs to go through the condensing coil, a/c on in traffic probably isn't going to work very well.

the temp of the air coming out the vent should be 39*..this is going down the road.

think of refrigeration this way, it doesn't make anything cold, it removes heat..the condensing coil (in the grill) is a heat exchanger, if its really hot out side or no air can take away the heat, your a/c will suck.

sounds like the high side switch on some on these cars may be bad...but 134 isn't as forgiving as the old r-12..
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Old 07-03-2013, 07:01 PM   #31
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ok thanks. The 39 should be after the car is warmed up and moving for say a mile? Want to go and test and see whats up. Even moving it really doesn't feel cold.







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for a/c to work efficiently, a fresh supply of air needs to go through the condensing coil, a/c on in traffic probably isn't going to work very well.

the temp of the air coming out the vent should be 39*..this is going down the road.

think of refrigeration this way, it doesn't make anything cold, it removes heat..the condensing coil (in the grill) is a heat exchanger, if its really hot out side or no air can take away the heat, your a/c will suck.

sounds like the high side switch on some on these cars may be bad...but 134 isn't as forgiving as the old r-12..
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Old 07-03-2013, 10:42 PM   #32
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ok. Just went on a 1/2 hour ride. Not scientific,but I used the wifes cooking them. to measure the AC. I go 66-69 just around town,like roughly 30 mph average. On the highway,it went down to 58-60 at about 65mph.
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Old 07-03-2013, 11:07 PM   #33
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I'm thinking your compressor is not running...

find a refrigeration person and have them put some gauges on the system.

you can go to an auto parts store and buy a can of 134a with a guage built into the can, i don't like these things cause you're dealing with high pressure, but it can tell you if you're low on freon...

jump the high side switch and see if the compressor comes on..
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Old 08-02-2013, 03:04 PM   #34
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i've been having a similar issue on my girlfriend's 2010 SS. It was fine at first, then all of the sudden would blow hot air. had it in my garage with the hood open, started the car and turned the a/c on. At first the compressor was running then all of the sudden it stopped and started blowing cold air. During our heat wave a couple weeks ago, it just wouldn't blow cold AT ALL. Now that the ambient air temps went down, the a/c is working again. Did anyone experience this at all?

Oh, we also took it to the dealer we purchased the car from (great people in the shop) and of course, the air worked flawlessly once it was in their hands. They did however update the BCM. The a/c worked for about a week straight after this, now we're experiencing the problem again.
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