Heat always on?
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Sounds like the blend door is not working properly, either it's stuck with a foreign object or the vacuum line driving it is broken. Remove your glovebox and pull the cover off the heater core for inspection.
Elder User
Joined: Nov 2005
Posts: 834
Likes: 0
If your truck is like my 90 f150, you can see the linkage and the cable for the blend door by just popping out the glove box. If you are real lucky, the cable is out of the clip and not moving the door. I'm never lucky.
If you move the temp control and the cable doesn't move, you have a problem at the other end of the cable. Might want to check the cable moving and the linkage moving before you pull the heater cover.
Good luck Frank
If you move the temp control and the cable doesn't move, you have a problem at the other end of the cable. Might want to check the cable moving and the linkage moving before you pull the heater cover.
Good luck Frank
