Electronic hvac controls not working
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Junior Member
Joined: Apr 2003
Posts: 3
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From: New Jersey
Car: 1988 Pontiac GTA
Engine: 350 LTR TPI
Transmission: 700R4
Electronic hvac controls not working
I've been searching a bit for the answer to this but I haven't found a clear answer. I have the digital dash in my 88 GTA and my vents are stuck on defrost. I have the HVAC system with the pushbutton controls. Is this control completely electronic or does it still use vacuum to open and close the diverter doors?
Supreme Member
Joined: Jul 1999
Posts: 1,593
Likes: 3
From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
It should be vacuum operated. The defrost setting is it's default setting which is a good indicator of this.
Check for an unhooked, broken, or pinched hose leading from the backside of the controls going through the firewall just to right side of the transmission. Unfortunately, I do not know where it might connect to the engines' intake system.
Check for an unhooked, broken, or pinched hose leading from the backside of the controls going through the firewall just to right side of the transmission. Unfortunately, I do not know where it might connect to the engines' intake system.
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The_Phoenix
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Feb 4, 2016 07:10 AM
