A/C heater control unit stopped working
Thread Starter
Intermediate
Joined: Jan 2011
Posts: 28
Likes: 0
A/C heater control unit stopped working
I have a '90 vette. My A/c control unit (digital) stopped working. It's a blank screen now but seems to power up. I changed the fuse under the passenger side dash...didn't help. I also tried replacing the unit with a used one I purchased and the same thing occurs. Seems to power up but blank screen. No access to any controls.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
You need the FSM drawings to do some testing on the plug/harness if 2 different control heads did the same thing. IIRC, check the courtesy fuse, and see IF there is a fusable link under the battery. IF its effected other interior lites, it could come back to the headlite switch...but that would not effect control...it would just be dark.
Get the drawings..
Get the drawings..
Cruising
Joined: Jul 2007
Posts: 11
Likes: 0
I have a '90 vette. My A/c control unit (digital) stopped working. It's a blank screen now but seems to power up. I changed the fuse under the passenger side dash...didn't help. I also tried replacing the unit with a used one I purchased and the same thing occurs. Seems to power up but blank screen. No access to any controls.
Instructor
Joined: Sep 2012
Posts: 167
Likes: 0
From: Johnstown Penna
Ac clutch fuse.... Almost has to be from what you are describing.... Double check that fuse and get back to us... Also wouldn't hurt to actually check the AC clutch to see if it didn't malfunction in some way...
