Can't regulate heat or AC temperature

THOMAS

MEMBER
1998 MAZDA B3000
6 CYL
2WD
AUTOMATIC
220,000 MILES

What device lets you turn heat up or down. Runs wide open hot and wide open on AC. Can't moderate temperature.

Monday, November 15th, 2010 AT 1:48 AM

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

There is what is called a blend air door that regulates the temp. It is located near the heater core and attaches (if I remember correctly) to a cable that is attached to the switch in the vehicle. If you follow the cable, it will lead you to the door. Make sure the cable isn't damaged or the door isn't sticking.

Let me know what you find.
Joe