HVAC Temp Control Question
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,756
Likes: 267
HVAC Temp Control Question
The temp control on my ‘04 is not working properly. The readout goes to max and will only come down if I move the **** very slowly. Do I need a rebuilt module…. of is there simple fix?
Drifting
Joined: Sep 2009
Posts: 1,862
Likes: 594
From: Prescott, Arizona
There is a very old factory service post in Corvette Action Center which indicates that some C5 computers get confused by rapid movement of the temp ****. Not sure which computer, the HVAC module in the dash or the body control module in the passenger footwell.
I experienced a similar symptom about 13 years ago when I could get no heat unless I rotated the temp **** slowly. Since then that is what I do and that method has worked fine since then.
I experienced a similar symptom about 13 years ago when I could get no heat unless I rotated the temp **** slowly. Since then that is what I do and that method has worked fine since then.
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,756
Likes: 267
There is a very old factory service post in Corvette Action Center which indicates that some C5 computers get confused by rapid movement of the temp ****. Not sure which computer, the HVAC module in the dash or the body control module in the passenger footwell.
I experienced a similar symptom about 13 years ago when I could get no heat unless I rotated the temp **** slowly. Since then that is what I do and that method has worked fine since then.
I experienced a similar symptom about 13 years ago when I could get no heat unless I rotated the temp **** slowly. Since then that is what I do and that method has worked fine since then.
If anyone else had some insight on this problem I’d love to hear from you.
Last edited by jost6453; Oct 11, 2022 at 10:08 AM.
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,756
Likes: 267
Instructor
Joined: Jan 2022
Posts: 154
Likes: 31
From: Temecula, CA
I'd test the pot and then trace it back from there. However most people probably don't know or don't want to go through the hassle. I haven't looked at that particular part in the unit so I can't speak on the ease of it.
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,756
Likes: 267
I’m no electronic tech, so don’t really know how to go about it. Is there a repair shop somewhere that could diagnose and repair?
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Instructor
Joined: Jan 2022
Posts: 154
Likes: 31
From: Temecula, CA
It may be something as simple as a $10 pot, which [in theory] should be easy to replace or it might be something else on the PCB which would be harder [or impossible] to replace/repair. To pay someone else to diagnose the problem... ultimately might not be worth it. It depends on how much they charge you to diagnose the problem. Also if they diagnose the problem, they might be able to repair it [parts availability for example].