1985 Corvette Heater Controls
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 39
Likes: 0
1985 Corvette Heater Controls
In my 85 No matter what setting the heater controls are on, Floor, Vent Defrost, etc. it is always coming out of the vents. What would cause this issue. All advice and suggestions are Greatly appreciated.. Thanks
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
Most common problem is lack of vacuum.
Follow the vacuum line from rear of plenum towards firewall. The vacuum line will end at a check valve which tees and one side feeds HVAC and the other feeds cruise and vacuum storage tank.
Check all the lines and check valve for a leak or no connection.
Follow the vacuum line from rear of plenum towards firewall. The vacuum line will end at a check valve which tees and one side feeds HVAC and the other feeds cruise and vacuum storage tank.
Check all the lines and check valve for a leak or no connection.
Racer
Joined: Oct 2011
Posts: 312
Likes: 0
From: state of insanity
on my 84,had a broken vac line,it was in with the wiring harness down by the starter. pita to find,who would think the vacumn line would go down there . to find,a neighbor walked over to see what was going on. in his normal rude self,he blew cig smoke in my face, this time he was a help. it hit me, i unhooked a vacume line had him blowing smoke smoke into it tell i saw where it was coming from.opened the harness and found the broken line. repaired with a piece of rubber line,everything has worked great every since. just my two cents
Le Mans Master
Joined: Jul 2004
Posts: 6,228
Likes: 698
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Ever had mice in your car? Seems they feast on the vacuum lines in back of the radio.
