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2001 Chevrolet Malibu heater/AC fan

Tiny
JACK2424
  • MEMBER
  • 2001 CHEVROLET MALIBU
  • 190,124 MILES
Heater/ac fan not working. Heat coming from vents. No blowing air. Replaced the ac/heater relay with no help..
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Saturday, October 26th, 2013 AT 9:37 AM

2 Replies

Tiny
JDL
  • MECHANIC
  • 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.
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Saturday, October 26th, 2013 AT 10:10 AM
Tiny
JDL
  • MECHANIC
  • 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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Saturday, October 26th, 2013 AT 10:22 AM

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