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Old 06-14-2013, 04:06 PM   #18
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I just took my 2012 ZL1 in for AC heat soak issues again. Anyone know of a bulletin? It seems the dealer still has no clue how to fix this issue and I drive everyday in the AZ heat.

Last year I took it in a couple times and got various feed back from - we adjusted the fluid level - GM is working on a solution "software upgrade". Once someone actually gave me a printed information packet that described how to turn the AC on. It made me laugh that someone would think I didn't know how to use AC in Arizona. I'm pretty familiar with the early 5thGen AC issues being that I've owned two 2010's that got the HVAC systems fixed under warrantee.

Looking for help cuz I don't want to go thru another summer having to drive in 105+ heat with the windows down.

Basically the AC stops working after I stop and let the car sit like going into a store or idling for a long time. After that it takes sometimes 10min for the AC temperature to stop blowing HOT.
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Old 06-14-2013, 05:25 PM   #19
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Originally Posted by itsadryheat79 View Post
I just took my 2012 ZL1 in for AC heat soak issues again. Anyone know of a bulletin? It seems the dealer still has no clue how to fix this issue and I drive everyday in the AZ heat.

Last year I took it in a couple times and got various feed back from - we adjusted the fluid level - GM is working on a solution "software upgrade". Once someone actually gave me a printed information packet that described how to turn the AC on. It made me laugh that someone would think I didn't know how to use AC in Arizona. I'm pretty familiar with the early 5thGen AC issues being that I've owned two 2010's that got the HVAC systems fixed under warrantee.

Looking for help cuz I don't want to go thru another summer having to drive in 105+ heat with the windows down.

Basically the AC stops working after I stop and let the car sit like going into a store or idling for a long time. After that it takes sometimes 10min for the AC temperature to stop blowing HOT.
Hello itsadryheat79,

Sorry you're having this issue with your A/C and I can definitely understand the urgency living in AZ. Can you private message me your VIN and current mileage? I will pull up your vehicle and see what information is available I can provide.

Reggie B.
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Old 06-14-2013, 05:45 PM   #20
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Hello itsadryheat79,

Sorry you're having this issue with your A/C and I can definitely understand the urgency living in AZ. Can you private message me your VIN and current mileage? I will pull up your vehicle and see what information is available I can provide.

Reggie B.
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PM sent with the the case number from last year -
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Old 06-14-2013, 05:50 PM   #21
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Yeh ours still sucks..brand new 6 month old 13 and hate the AC more than any other car I've owned.
it flat sucks. now that it is 100+ down here in Houston it's terrible.
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Old 06-15-2013, 11:01 AM   #22
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PM sent with the the case number from last year -
Thank you itsadryheat79,

I will be looking into this right away for you. I will contact you through the PM.

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Old 06-15-2013, 01:07 PM   #23
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Yeh ours still sucks..brand new 6 month old 13 and hate the AC more than any other car I've owned.
it flat sucks. now that it is 100+ down here in Houston it's terrible.

Hello DuskSS,

Sorry you are having some trouble with your A/C and feel it's inadequate. Have you visited your dealership on this issue?

Reggie B.
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Old 06-18-2013, 06:24 PM   #24
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Still no solution - AZ ZL1 heat soak AC issue

Quote:
Originally Posted by itsadryheat79 View Post
I just took my 2012 ZL1 in for AC heat soak issues again. Anyone know of a bulletin? It seems the dealer still has no clue how to fix this issue and I drive everyday in the AZ heat.

Last year I took it in a couple times and got various feed back from - we adjusted the fluid level - GM is working on a solution "software upgrade". Once someone actually gave me a printed information packet that described how to turn the AC on. It made me laugh that someone would think I didn't know how to use AC in Arizona. I'm pretty familiar with the early 5thGen AC issues being that I've owned two 2010's that got the HVAC systems fixed under warrantee.

Looking for help cuz I don't want to go thru another summer having to drive in 105+ heat with the windows down.

Basically the AC stops working after I stop and let the car sit like going into a store or idling for a long time. After that it takes sometimes 10min for the AC temperature to stop blowing HOT.
Well my dealer still has no clue how to fix this - They know this is a problem because another ZL1 customer had this issue last year and they have been able to repeat it. So wave to me when you see me pulled over by the popo for doing 70 in a 45 so I can roll the windows up! Yes I'm frustrated ..... :(
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Old 06-18-2013, 06:29 PM   #25
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That's really weird, the A/C in my '13 can freeze me out and it's been 100 outside here already. Guess I got lucky. Hope you gets yours figured out OP.
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Old 06-20-2013, 12:21 PM   #26
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That's really weird, the A/C in my '13 can freeze me out and it's been 100 outside here already. Guess I got lucky. Hope you gets yours figured out OP.
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Old 06-20-2013, 03:56 PM   #27
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no problems here, the p@#$y of my father in law has to close the vents because his to cold. boo hoo. there are people in africa with no a/c and his bitching.
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Old 06-22-2013, 12:47 AM   #28
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Good news - Fix allegedly found for the ZL1 AZ heat soak AC problem.

Chapman my dealer says they finally figured out how to solve my ZL1 AC heat soak problem! - I have been experiencing this all last summer and again this summer.

With a full factory specified charge of freon and when its real hot the AC High Side Freon switch prevents the AC compressor from turning on. This senerio happens when you drive it in the 102+ heat and then stop like to go into a store or to fill up on gas. When you start the car the AC compressor does not turn back on until you can go about 45mph. This also sometimes happened when I would idle for an extended period with the AC on too. But while idling the AC is initially fine but after the the heat soak it's when your driving that the high side switch acts this way. This was hard to diagnose without a computer monitoring when the high side switch prevented the compressor from turning on.

By removing about 2oz of fluid it was noticed that it prevents this situation and according to my AZ service advisor it actually cools better here this way also. - I pick up my ZL1 tomorrow and will try it myself.

I'm not sure this reduction of freon would help others in more humid climates but the high side switch acting this way might be something to watch for.

GoodTimes!
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Old 06-22-2013, 01:06 AM   #29
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snymat68...134a isn't as good as the old r-12, but my duramax with 134a runs just a tad under 40* measured at the vent..you need to have a fresh supply of wind going across the condenser coil, slow driving could cause a bit higher temp...

what I've done when charging my s-10 was to put a good fan in front of the coil and watched the compressor clutch..and read the gauges...but it needs to really blow as if driving a a decent clip..
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Old 06-25-2013, 07:40 AM   #30
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...slow driving could cause a bit higher temp...
Yeah, but my problems happen all the time. I can be sitting still, going 80mph, or anything in between. I'm going to talk to a tech at Grabiak's this afternoon to see what they have to say and see if they want to tackle the issue. I'll keep everyone posted.
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Old 06-25-2013, 11:01 PM   #31
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I stopped by Grabiak Chevy today for a 1hr complementary check for my AC issues that Day Chevy hasn't been able to diagnose/fix in 3days worth of tinkering. Grabiak had it for about 45min and told me they found the issue. They said the pressures aren't equalizing between the high and low sides. They weren't sure if it is a partially/fully obstructed hose or if the compressor itself is going and clogging the line(s) with shrapnel. I'm scheduled to drop the car off on the 8th (after the holiday) to have them dig into it and fix it. They explained how they're going to investigate the entire system to track down the actual cause of the problem and not just throw parts at it. Today was my first experience with them but I'm impressed so far. If they come through on this it looks like I have a new dealer. On a side note, after seeing their performance center showroom, my wallet is doomed.
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Old 08-26-2013, 10:37 PM   #32
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I have a 13 LS and while driving down the road in 100+deg heat in Austin TX, my A/C went out! So very upsetting. I haven't even had it a year and its already broke! After reading all these comments, it scares me into thinking this is a very common problem and wondering if she's worth keeping. Now don't get me wrong, I love my girl "Faith" but.......She's at the dealership right now, hopefully something can be figured out. But I am not sure this is a problem I want to have in TX.
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