Can't regulate heat or AC temperature

1998 MAZDA B3000
220,000 MILES • 6 CYL • 2WD • AUTOMATIC
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THOMAS
  • MEMBER
  • 1 POST
What device lets you turn heat up or down. Runs wide open hot and wide open on AC. Can't moderate temperature.
Nov 15, 2010 at 1:48 AM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 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
Nov 15, 2010 at 1:50 AM
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