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Old 10-15-2013, 05:42 PM   #1
MrAL300
 
Drives: 2014 Camaro 2LS Blue
Join Date: Sep 2013
Location: USA
Posts: 23
2014 2LS a/c glitch

I've had my 2014 2LS for a month. It's my first camaro and I love it. There is one glitch with the a/c which neither the dealership nor GM can solve. I am curious if anyone else has this anomaly. Here's what happens:

When I turn on the fan, the a/c also comes on. I can turn off the a/c and then it stays off regardless of how many times I turn the fan off and on again, or how many times I turn the engine off and on again, as long as this is done within a certain time period. However, after several hours go by, the problem repeats. For example, first thing in the morning, or after work, if I turn on the fan, the a/c comes on. I can turn it off, and then if I am in a supermarket for 30 minutes and then return to the car, when I turn on the fan, the a/c does not come on. This problem only occurs after several hours have passed since the a/c was last turned off. Please note that I do ensure the a/c is off prior to turning off the fan, so the problem is not that I am leaving the a/c on by mistake.

My car spent a week at the dealer where they consulted with GM and tried the following:
1) computer update
2) replace hvac controller
3) replace radio & faceplate.
None of these solved the problem. Now, GM wants to send a field engineer to the dealership to do more testing on my car. I really don't want my brand new car to be a guinea pig, torn apart and put back together again. There is another 2014 2LS in the dealer's inventory but they would prefer to experiment on my car because they have already attempted the 3 "fixes" described above.

Is anyone else experiencing this problem, and if so, have you found a way to fix it? Is it possible that this is not a flaw, but instead something that was designed into the 2014 model?
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Old 10-15-2013, 11:54 PM   #2
Ambush
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Drives: 2014 Camaro 2LT RS
Join Date: Sep 2013
Location: Parsippany, NJ
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wow, that's a pain. can't say its happened to my car...yet. i'm running a 2014 2LT. Windows are always down, so I don't use the AC, but sure, knock on wood, gonna put the AC on for a few days and see.

for science!
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Old 10-16-2013, 11:21 PM   #3
Coloradorado
 
Drives: 2014 Camaro
Join Date: Aug 2013
Location: New Jersey
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Come to think of it, I think my 2014 1LT might do this... I just assumed I was retarded and was hitting the button when I wasn't paying attention. I just looked up the HVAC operation. It sounds like it can be used when you aren't specifically trying to cool the car, but it doesn't say anything about it coming on automatically.

Quote:

The purpose of the heating and A/C system is to provide heated and cooled air to the interior of the vehicle. The A/C system will also remove humidity from the interior and reduce windshield fogging. Regardless of the temperature setting, the following can affect the rate that the HVAC system can achieve the desired temperature:
  • Recirculation actuator setting
  • Difference between inside and desired temperature
  • Blower motor speed setting
  • Mode setting
Pressing the A/C switch enables the HVAC control module to request A/C compressor engagement and turn ON the A/C switch LED. The HVAC control module sends a message to the engine control module (ECM) for A/C compressor engagement. The ECM will provide a ground for the A/C compressor relay enabling it to close its internal contacts to send battery voltage to the A/C compressor clutch coil. The A/C compressor diode will prevent a voltage peak, resulting from the collapse of the magnetic field of the coil, from entering the vehicle electrical system when the compressor is disengaged.
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Old 10-16-2013, 11:23 PM   #4
Coloradorado
 
Drives: 2014 Camaro
Join Date: Aug 2013
Location: New Jersey
Posts: 14
Quote:
Press snowflake to turn the air conditioning on or off. An indicator light turns on. If the fan is turned off or the outside temperature falls below freezing, the air conditioning will not work.

The air conditioning might automatically come on when defrost is selected.
Guess I should have read the owners manual. It is normal.
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Old 10-17-2013, 05:29 AM   #5
MrAL300
 
Drives: 2014 Camaro 2LS Blue
Join Date: Sep 2013
Location: USA
Posts: 23
Yes, that is correct. My manual says that too. I am referring to the a/c coming on without the use of defrost. My vent selection is the forward vents or bi-level only. The snowflake button lights up. Defrost is different. The compressor activates but the a/c (snowflake) light does not.
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Old 10-31-2013, 05:14 PM   #6
MrAL300
 
Drives: 2014 Camaro 2LS Blue
Join Date: Sep 2013
Location: USA
Posts: 23
The field engineer was not able to determine the cause or find a way to fix it. He doesn't know why it is happening but he doesn't think it should happen. He took lots of data from the computer and will send it to GM Engineering for analysis. It is interesting to note that the engineer determined that if this fan is turned on before starting the car then the a/c will not come on unless the a/c button is pressed. This is very interesting. It's not a solution but it's a work-around I can live with.
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Old 10-31-2013, 05:22 PM   #7
Cruuzin LV
 
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Drives: 2012 Camaro SS 45th Anniversary
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My 2012 does that and I didn't think it was an issue. I just press the A/C button if I see it come on when i turn the fan on. It is a little differernt from other cars I have owned I will admit. However my other vehicles have an A/C button that clicks in or clicks out for on and off instead of just pressing it.
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