heater problems

1998 GMC SONOMA
140,000 MILES • 2.2L • 4 CYL • 2WD • MANUAL
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GARY HUNT
  • MEMBER
  • 1 POST
heater works on defrost and bi level does not work on floor goes to defrost even in heat position.
Aug 8, 2017 at 9:17 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,721 POSTS
Hello,

It sound like you have a blend door actuator that has gone out. Here is a guide to help you get ht problem fixed.

https://www.2carpros.com/articles/replace-blend-door-motor

Please let us know what happens.

Cheers, Ken
Aug 12, 2017 at 11:04 AM
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