WHAT WOULD CAUSE BLOWER NOT TO WORK ON HEATERAC

  • Tiny
  • Anonymous
  • 2003 Chevrolet Silverado
  • 203,000 miles

What would cause blower not to work on heater/ac

Wednesday, January 30th, 2013 AT 5:40 PM

2 Answers

  • Tiny
  • JDL
  • Expert
  • 16,290 posts

Check for voltage and ground at the blower motor connector, key on, blower controls on. If good voltage and ground with no blower action, suspect the blower motor. If no voltage, could be wiring circuit--fuse-- blower motor control module, where applicable.

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Wednesday, January 30th, 2013 AT 6:32 PM
  • Tiny
  • JDL
  • Expert
  • 16,290 posts

At the blower motor, the purple wire is voltage, black wire is ground. Note the diagram. The red wire to processor is fuse protected, blower fuse. There are a couple other fuses, that go to the hvac control module.

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Wednesday, January 30th, 2013 AT 6:40 PM

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