No heat - where do I start first?
Thread Starter
Instructor
Joined: Feb 2006
Posts: 105
Likes: 0
From: Houston Texas
No heat - where do I start first?
I have no heat with the control set to heater. The fan blows but the air never warms. I smell no radiator fluid in the car. Is there blockage somewhere or maybe a valve closed?
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
Sounds like the heater control valve. With the engine up to operating temp feel the hose going into the valve and see if it is hot on both sides of the valve also feel the hose coming out of the heater core and see if it is hot or cold. Also make sure you are getting vacumn up to your control valve. If you have warm hose in and out of your core it may be the door in side that I believe is cable operated not opening up from the heater core.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
If you have A/C, there is a vacuum operated water valve in the heater hose about 1/2 way between the engine and heater inlet at firewall. Maybe stuck closed or the vacuum hose came off.
