99 cadillac escalade heater blower

1999 CADILLAC ESCALADE
135,000 MILES • V8 • 4WD • AUTOMATIC
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BRIAN_DOMINY
  • MEMBER
  • 2 POSTS
the main heater blower inop when cold. have replaced blower, relay, resister coils. control panel. it works about 15 to 20 minutes of drive time. is there some other component in the system that I am over looking
Jan 14, 2011 at 9:25 PM
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BRIAN_DOMINY
  • MEMBER
  • 2 POSTS
it starts to work after 15 to 20 minutes of drive time. then it will work all day.
Jan 14, 2011 at 9:34 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
You replaced everything. Check to see if there is power to the motor when it doesn't work. If there is, my first guess is a weak ground. If there is no power, the only thing you can do is start tracing wires from the blower motor back to locate where the power loss is located.
Jan 14, 2011 at 10:57 PM
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