1986 Auto Climate Control trouble
Thread Starter
Racer
Joined: Aug 2007
Posts: 370
Likes: 6
1986 Auto Climate Control trouble
If anyone can help me i have a 1986 Corvette and I just started having trouble with the auto climate control. At first sometimes i get heat sometimes I don't no matter what i have the temp set at it just blows could air and then I try later and sometimes I will get heat. Coolant system temp is all normal. Then today I decided to take the car for a ride and yet again cannot get heat so I tryed turning the temp down to 60 and back up because sometimes this will get me heat again but now its stuck at 60 . is this unit bad and the door in the dash possibly getting stuck? Any help PLEASE>
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
If you're saying the display is stuck at 60, the control is bad. Otherwise, you've likely broken the clip that connects the temp-control-motor to the temp door. It's a plastic clip that only $5 from a dealership.
The temp door arm (and clip) are located on the passenger side near the ECM.
If broken, the temp door with flop from side-to-side. I suspected hard turns were flopping mine around!
It's kinda "sticky" at max cold/hot though. Doesn't always flip that easy.
You might have to remove the hush panel to see it. (Mine is a little easier to see/observe because I'd also removed my breadbox).
The temp door arm (and clip) are located on the passenger side near the ECM.
If broken, the temp door with flop from side-to-side. I suspected hard turns were flopping mine around!
It's kinda "sticky" at max cold/hot though. Doesn't always flip that easy.
You might have to remove the hush panel to see it. (Mine is a little easier to see/observe because I'd also removed my breadbox).
1st Gear
Joined: Feb 2007
Posts: 1
Likes: 0
If anyone can help me i have a 1986 Corvette and I just started having trouble with the auto climate control. At first sometimes i get heat sometimes I don't no matter what i have the temp set at it just blows could air and then I try later and sometimes I will get heat. Coolant system temp is all normal. Then today I decided to take the car for a ride and yet again cannot get heat so I tryed turning the temp down to 60 and back up because sometimes this will get me heat again but now its stuck at 60 . is this unit bad and the door in the dash possibly getting stuck? Any help PLEASE>
I have a 1988 and my control is stauck on 90, where do you get another control and how much does it cost???
Thanks,
The Eagle
Team Owner
Joined: Jan 2003
Posts: 20,298
Likes: 240
From: Summerland B.C. Canada
My controller started to get funky, so I cleaned the electrical contacts in back. It's been 5 years without a problem since.
https://www.corvetteforum.com/techti...D=92&TopicID=2
https://www.corvetteforum.com/techti...=118&TopicID=2
https://www.corvetteforum.com/techti...D=92&TopicID=2
https://www.corvetteforum.com/techti...=118&TopicID=2
Drifting
Joined: Aug 2008
Posts: 1,921
Likes: 53
From: Philadelphia Pa
I had the same intermittent problem on my 87. Took out the ACC and cleaned it up. Still didn't work, so I bought a used one off of eBay and that works fine, $75. Still have the old unit. I didn't do the re-solder thing yet on the original unit. If the used ACC dies, then I'll try the soldering fix on my original unit.
