fan speed on 2002 Chevrolet Avalanche 2500

while in the heater/defroster setting my fan does not go to high speed. at times in may kick in for a few moments then goes back down, what is possible problem? the fan switch or what?

by in Anchorage, AK on October 29, 2009
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1 answer
ANSWER by , October 30, 2009
The fan switch could be the problem with the HVAC blower of your 2002 Chevrolet Avalanche. The fault could also be the relay or a connection issue anywhere in the blower motor circuit. I complete diagnoses of the blower motor may be necessary to isolate the cause of your fault.