Heat then no heat?
Thread Starter
Racer
Joined: Oct 2002
Posts: 449
Likes: 2
From: Fayetteville, PA
Heat then no heat?
It was 12deg. this morning when I started the car today. Just let it warm up. Got nice n' tostie inside, so I decided to take it to work in NYC (35 mile run). Doing 65MPH on Rte78, about half way no more heat, just cold air. Slowed down at the Holland Tunnel the heat came back. Going home the same thing happened in reverse, no heat till I got near home. Did anyone have a problem like this?
PS Caught the Rat that ate up my tunnel/transmission colar. Got stuck on a sticky pad. :smash: :smash: :smash:
PS Caught the Rat that ate up my tunnel/transmission colar. Got stuck on a sticky pad. :smash: :smash: :smash:
Melting Slicks
Joined: Apr 2002
Posts: 2,620
Likes: 0
From: 20 forward gears to shift through in MD
Re: Heat then no heat? (77BlueL82)
If you have a/c, the problem could be with the heater diverter valve (which is operated via vacuum). Slowing down (coasting) may have resulted in sufficient manifold vacuum to kick the valve back on, but when accelerating the vacuum signal could have dropped enough to close the valve. If you don't have a/c, I would then suspect perhaps a clogged heater core... If you do have a/c, you could bypass the valve and see if that fixes the problem (then check the vacuum line to the valve for splits and vacuum levels). If the vacuum is ok on the line, then I would get a new valve. :seeya
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Re: Heat then no heat? (Jvette73)
Check the coolant level in the rad. Low coolant level can cause what you describe.
Gary
