Question about 2002 Chevrolet Blazer

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Heater wont work a fuse maybe? some how I doubt it. the rear window heater works. fan dead perhaps? no fan at all. not sure about heat.

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Hi: Sounds like a possible heater resistor problem. First check to see if heater fan working, unplug heater under hood and put 12 volts to it from the battery with a wire (single black wire running to back of fan). If works then problem probably the resistor which is located on the fan housing under the hood to the right of the fan. The resistor has wires to it running from the heater fan, 2 - 7mm screws holding resistor in place, check resistor to see if any of the 3 elements are melted off, if so replace. Note: Rear window defrost has nothing to do with heater fan. Hope this helps...

Posted on Feb 26, 2009

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