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2003 Chevy Avalanche Heater fan control

Tiny
JOHN03AV
  • MEMBER
  • 2003 CHEVROLET AVALANCHE
  • V8
  • 4WD
  • AUTOMATIC
  • 127,000 MILES
My heater fan control seems to blow on low on all selections except for number 5 which functions fine. Basically my heat or fan motor either doesn't work or holly crap. What could be the problem?
Thanks in advance.
John C
Friday, December 18th, 2009 AT 11:44 AM

1 Reply

Tiny
DENNYP
  • MECHANIC
  • 1,824 POSTS
The blower motor is under the dash on passenger side. There is a small resistor module mounted near the blower motor. It has two wires that go to the motor and a connector with several more wires. Remove the large connector and check to see if any of the wires are melted. If not, let me know so we can dig deeper.
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Monday, December 21st, 2009 AT 2:46 PM

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