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Defroster 99 S-10

Tiny
TANGO426
  • MEMBER
  • 1999 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 105,000 MILES
99 s 10 heater wont come off vent to defroster or floor heat Just bought the truck, it has been sitting for a couple of years, I know the door for the vents etc may be stuck, and it may fix its self, but in the out side chance it wont I have no info on the truck, does it have a vacum motor for the door or is it and electric motor and where is it located, thanks
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Wednesday, December 1st, 2010 AT 3:41 PM

1 Reply

Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
The heater system uses both the cable and a vacuum lines. If the vehicle has been sitting for a couple of years. Spray a little wd-40 into the heater controls. Don't spray where the fan speed switch is. Move the controls back and forth a few times. Sometimes the rubber 0 rings get stuck from sitting in one positon for a while. Move the control up and down slowely to free up the lines.
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Wednesday, December 1st, 2010 AT 4:51 PM

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