1999 obs Suburban fan motors

By redchev1
June 21, 2006 in 1999-2013 Silverado 1500 & Sierra 1500

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redchev1

Posted June 21, 2006

Vehicle: 1999 OBS suburban front and rear ac/heat

I started my truck after stopping for 10 minutes and smoke started coming out of the front air vents. Now neither of the fans come on. My question is there more than one resistor for the fans, fuses, ect. I am going to take a look at the resistor behind the glove box and the fans is there anything else to check?

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Posts
- Hot air constantly blowing through floor vents, drivers side only?
  
  By davester · Posted 26 minutes ago
  
  And there aren't any "bellows". There are solid plastic doors the actuators move, which largely seal just by themselves, and then have a strip of foam around the edge to better seal the door. The foam does deteriorate over time, but this is unlikely to be a significant cause of the problem.
- Hot air constantly blowing through floor vents, drivers side only?
  
  By davester · Posted 28 minutes ago
  
  are the heater controls set for hot or cold air? If it's set for hot, and say, to get air from outside the cab (vs recirculated air), even w the fan off, air will get pushed through the hvac system, over the heater core and into the cab. Switching it to cold will reduce the temp to whatever it is outside. Switching to recirculate mode (which may mean switching to vents or whatever, read your owners manual), will reduce the amount of airflow through the hvac system.
- Hot air constantly blowing through floor vents, drivers side only?
  
  By dna9656 · Posted 1 hour ago
  
  Prolly diaphragm bellows rotted out. Given the age of your truck.
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