dual zone hvac control head problem
Thread Starter
8th Gear
Joined: Jul 2018
Posts: 8
Likes: 1
From: Batavia Ohio
dual zone hvac control head problem
you may have seen my other post, but let me clarify. My problem is that the passenger side control **** does not change the temp setting for that side. The AC works but only according to the drivers side control ****. there seems to be confusion as to what the passenger side **** is suppose to do. When I got the car the passenger **** worked until the compressor leaked the freon out. The compressor was changed but nobody including the local Chevrolet mechanics can get the passenger side to work again. I also have a 2004 Yukon and a 2006 Cadillac DTS with dual zone controls and they both work like my C5, 2000 corvette should work. I have tried the suggested fixes, remove fuse #27 from passenger foot well fuse box and also disconnecting battery for about 30 minutes. neither of these fixed the issue. The head unit worked fine before the compressor went bad. A corvette expert told me that when the freon is low the system goes into a default mode where only the drivers side works. Does anyone know if this is true? My system is supposedly fully charged according to the Chev dealership who installed the new compressor and tube at a cost of almost 1900 dollars. Please let me know if you have had this problem
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
you may have seen my other post, but let me clarify. My problem is that the passenger side control **** does not change the temp setting for that side. The AC works but only according to the drivers side control ****. there seems to be confusion as to what the passenger side **** is suppose to do. When I got the car the passenger **** worked until the compressor leaked the freon out. The compressor was changed but nobody including the local Chevrolet mechanics can get the passenger side to work again...
This is the way the dual-zone HVAC system works in a C5:
When the passenger side is set to the 12:00 (center) position, the driver and passenger side are both set to the temp selected by the driver's side, then the passenger can vary his/her side slightly up and down if desired. This is how it works, unless the driver is set to full up (90°F) or full down (60°F), then the passenger setting will have no effect.
The display will not change with the passenger adjustment.
Last edited by GCG; Jul 8, 2018 at 02:42 PM.
Thread Starter
8th Gear
Joined: Jul 2018
Posts: 8
Likes: 1
From: Batavia Ohio
At what temperature is the driver's side set?
This is the way the dual-zone HVAC system works in a C5:
When the passenger side is set to the 12:00 (center) position, the driver and passenger side are both set to the temp selected by the driver's side, then the passenger can vary his/her side slightly up and down if desired. This is how it works, unless the driver is set to full up (90°F) or full down (60°F), then the passenger setting will have no effect.
The display will not change with the passenger adjustment.
This is the way the dual-zone HVAC system works in a C5:
When the passenger side is set to the 12:00 (center) position, the driver and passenger side are both set to the temp selected by the driver's side, then the passenger can vary his/her side slightly up and down if desired. This is how it works, unless the driver is set to full up (90°F) or full down (60°F), then the passenger setting will have no effect.
The display will not change with the passenger adjustment.
the control unit shows a temp for drivers side and passenger side both. Why is there so much confusion about this? If other C5 owners have cars that have dual zone control units please let me know if your passenger side display adjust when the passenger side **** is turned or am I just crazy. 2 different techs have told me that when the compressor failed the car went into a default mode that stopped the ps from working.
Last edited by Ron W; Jul 8, 2018 at 04:32 PM.
Thread Starter
8th Gear
Joined: Jul 2018
Posts: 8
Likes: 1
From: Batavia Ohio
At what temperature is the driver's side set?
This is the way the dual-zone HVAC system works in a C5:
When the passenger side is set to the 12:00 (center) position, the driver and passenger side are both set to the temp selected by the driver's side, then the passenger can vary his/her side slightly up and down if desired. This is how it works, unless the driver is set to full up (90°F) or full down (60°F), then the passenger setting will have no effect.
The display will not change with the passenger adjustment.
This is the way the dual-zone HVAC system works in a C5:
When the passenger side is set to the 12:00 (center) position, the driver and passenger side are both set to the temp selected by the driver's side, then the passenger can vary his/her side slightly up and down if desired. This is how it works, unless the driver is set to full up (90°F) or full down (60°F), then the passenger setting will have no effect.
The display will not change with the passenger adjustment.
the control unit shows a temp for drivers side and passenger side both. Why is there so much confusion about this? If other C5 owners have cars that have dual zone control units please let me know if your passenger side display adjust when the passenger side **** is turned or am I just crazy. 2 different techs have told me that when the compressor failed the car went into a default mode that stopped the ps from working
Please don't respond with what you have only read, please only respond with real life experience you had/have with your own car.
Thread Starter
8th Gear
Joined: Jul 2018
Posts: 8
Likes: 1
From: Batavia Ohio
When I first got the car the passenger side display DID change as the passenger side **** was turned and only stopped when the compressor failed. This is also the same for my 2004 GMC Yukon and my 2006 Cadillac DTS.
the control unit shows a temp for drivers side and passenger side both. Why is there so much confusion about this? If other C5 owners have cars that have dual zone control units please let me know if your passenger side display adjust when the passenger side **** is turned or am I just crazy. 2 different techs have told me that when the compressor failed the car went into a default mode that stopped the ps from working
Please don't respond with what you have only read, please only respond with real life experience you had/have with your own car.
the control unit shows a temp for drivers side and passenger side both. Why is there so much confusion about this? If other C5 owners have cars that have dual zone control units please let me know if your passenger side display adjust when the passenger side **** is turned or am I just crazy. 2 different techs have told me that when the compressor failed the car went into a default mode that stopped the ps from working
Please don't respond with what you have only read, please only respond with real life experience you had/have with your own car.
Cruising
Joined: Feb 2018
Posts: 10
Likes: 3
When I first got the car the passenger side display DID change as the passenger side **** was turned and only stopped when the compressor failed. This is also the same for my 2004 GMC Yukon and my 2006 Cadillac DTS.
the control unit shows a temp for drivers side and passenger side both. Why is there so much confusion about this? If other C5 owners have cars that have dual zone control units please let me know if your passenger side display adjust when the passenger side **** is turned or am I just crazy. 2 different techs have told me that when the compressor failed the car went into a default mode that stopped the ps from working
Please don't respond with what you have only read, please only respond with real life experience you had/have with your own car.
the control unit shows a temp for drivers side and passenger side both. Why is there so much confusion about this? If other C5 owners have cars that have dual zone control units please let me know if your passenger side display adjust when the passenger side **** is turned or am I just crazy. 2 different techs have told me that when the compressor failed the car went into a default mode that stopped the ps from working
Please don't respond with what you have only read, please only respond with real life experience you had/have with your own car.
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
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