Question about 2002 Chevrolet Avalanche

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Heater fan only works on high on my 2002 Avalanche

Fan start making a sqeeling niose right before it stopped working on settings 1, 2, 3, 4 and now will only work on high

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  • Anonymous Mar 13, 2014

    the 1-4 levels don't turn only the fan only works on high

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  • Chevrolet Master
  • 5,568 Answers

If your Chevy is equipped like most vehicles, the speed control is accomplished by a stepped or tapped resistor that has now failed. This may be located on the fire wall under the hood or near the blower assembly under the dash. When these resistors go 'open' inside, it will only affect the lower speeds since the fastest speed bypasses the resistor completely. Can't say how hard yours is to access but the part is pretty itself is cheap, guess that's why they fail so often.

Posted on Feb 19, 2009

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