2001 Chevrolet Malibu heater/ac fan

2001 CHEVROLET MALIBU
190,124 MILES
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JACK2424
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  • 2 POSTS
heater/ac fan not working. heat coming from vents. no blowing air.replaced the ac/heater relay with no help....... ...............................................................................................................................................................................................................................................................................................................................................................
Oct 26, 2013 at 9:37 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
I'd have to check the fan circuit for voltage and ground with blower turned on. If good voltage and ground with no blower operation, suspect the blower motor.
Oct 26, 2013 at 10:10 AM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Just to add, at the blower motor, purple wire is voltage, black wire is ground. In the diagram for manual hvac, see the high blower relay? When the relay is not energized, there is voltage for lower speeds, lower speeds use a resistor. When relay is energized only voltage for high speed, high speed doesn't use a resistor.
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Oct 26, 2013 at 10:22 AM