Problem with electronic heat/AC unit
Thread Starter
Instructor
Joined: Aug 2004
Posts: 141
Likes: 0
From: Wake Forest NC
Problem with electronic heat/AC unit
Hey guys and gals,
I have a 2010 GS with the dual zone climate heat/air system. About 4 out of 5 starts of the engine the AC/heat unit illuminates and shows the ext. temp. However none of the buttons or ***** do anything on that unit. The unit will not power up so heat and AC don't work. The GPS system and even those heated seats work when this happens. The back light is always on along with the ext temp so I'm assuming it is getting power and not a blown fuse. Of course 1 out of 5 times I start up it works fine. Heat is hot and AC is cold and all the buttons work as normal. Wanted to see if anyone else had this problem. I did a search but every result is about AC compressors. That isn't my issue.
any ideas?
thanks!
I have a 2010 GS with the dual zone climate heat/air system. About 4 out of 5 starts of the engine the AC/heat unit illuminates and shows the ext. temp. However none of the buttons or ***** do anything on that unit. The unit will not power up so heat and AC don't work. The GPS system and even those heated seats work when this happens. The back light is always on along with the ext temp so I'm assuming it is getting power and not a blown fuse. Of course 1 out of 5 times I start up it works fine. Heat is hot and AC is cold and all the buttons work as normal. Wanted to see if anyone else had this problem. I did a search but every result is about AC compressors. That isn't my issue.
any ideas?
thanks!
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
Occasionally HVAC control panels go bad with varying levels of malfunction: unresponsive buttons, blinking numbers, goofy symbols. Mine got progressively worse until it no longer worked at all. All connectors, fuses, etc. were good. The fix was replacement.
You used to hear about this a lot in the early years of the C6, but it seems like a less common problem now.
You used to hear about this a lot in the early years of the C6, but it seems like a less common problem now.
Safety Car
Joined: Nov 2006
Posts: 4,023
Likes: 266
From: San Jose California
As stated, the fix is replacement and the things aren't cheap 
My wife's 2007 C6 unit went wacky (the buttons locked up to where the max pressure I could put on them wouldn't budge them. Wtf?!)
I replaced it with a salvage yard unit. Even that wasn't particularly cheap.
Partstaxi.com (a forum vendor) has it new for $375.
http://orders.partstaxi.com/parts/20...group=CONTROLS
Z//
My wife's 2007 C6 unit went wacky (the buttons locked up to where the max pressure I could put on them wouldn't budge them. Wtf?!)
I replaced it with a salvage yard unit. Even that wasn't particularly cheap.
Partstaxi.com (a forum vendor) has it new for $375.
http://orders.partstaxi.com/parts/20...group=CONTROLS
Z//
Safety Car
Joined: Nov 2006
Posts: 4,023
Likes: 266
From: San Jose California
On the other hand, replacing the thing is a piece of cake and will cost you nothing in labor. It's a perfect time to install that MGW shifter you've been wanting, too
Z//
