heater problems on 2004 Chevrolet Impala

how do you know if it is the heater blower or the heater blower resistor?

by in Gainesville, GA on December 02, 2009
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1 answer
ANSWER by , December 03, 2009
Generally when the blower motor resistor fails, the blower fan will work on the highest setting and not the others. If the fan doesn't work at all, check for power and ground signals to the motor and go from there.