Question about Chevrolet Impala

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The heater fan won't stop, even if i turn off the key the fan still turn, unable to control it, it only turn at one speed (not the fastest one), i check the resistor it look like there's a short in it, the voltage past true the batt to the motor without any signal. I change it, the second one work for at least 1h30, now the problem still the same the only difference it's the speed of the fan with the second one it's turn slower, but i can't control it. Thank's for your help Impala 2005

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  • Chevrolet Master
  • 11,496 Answers

Your impala doesn't have a resistor , it has a blower motor control processor and it doesn't work the way you think it does
Chevy Trailblazer EXT Blower Motor Won Turn Off
Blower Motor Control Processor
The blower motor control processor is an interface between the HVAC control module and the blower motor. The blower motor speed control, battery positive voltage and ground circuits enable the control processor to operate. The HVAC control module provides a PWM signal to the control processor in order to command the blower motor speed. The processor supplies 12 volts to the blower motor through the blower motor voltage supply circuit. The control processor uses the blower motor ground as a low side control to adjust the blower motor speed.

HVAC Blower Motor Circuit

Posted on May 27, 2017

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Posted on Jan 02, 2017

  • 73 Answers

SOURCE: 2000 cherokee sport blower motor control

It is a bad blower motor resistor and it is mounted on the bottom of the A/C heater housing on the passenger side of the vehicle under the glovebox area. Hope this helps. Please rate this a fixya if it helps. Thanks.

Mike

Posted on Sep 13, 2008

  • 261 Answers

SOURCE: 2006 Chevy Impala - Heater

the blower motor resistor is damaged probably in the process of removing the heater core replace the blower motor resistor, and please dont forget to rate me!!

Posted on Dec 02, 2008

  • 107 Answers

SOURCE: Lincoln 2000 town car Blower doesn't work at HI-MED-LOW speeds...

it is called blower motor resistor , should be close to blower motor , you will see a plug type connector with two screws , remove the screws and there should be a resistor inside the cover for the motor, swap with new and reassemble

Posted on Feb 19, 2009

  • 118 Answers

SOURCE: How do i change the Blower motor resistor on a 2005 chevy impala?

The blower motor resistor is located behind the glovebox mounted in the fan housing box under the dash.

Posted on Jul 20, 2009

  • 462 Answers

SOURCE: heater control fan only works on speed 5. Removed

Your looking for the blower resistor. Its on the passenger side under the dash. Two of the wires go the the blower motor. The wire connector and the resistor can burn or corrode. The replacement is easy two screws hold the resistor in and the connector can be replace with **** connectors.

Posted on Dec 12, 2009

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