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Heater or defroster fan wont shut off Continues to run after motor is off.

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  • Cars & Trucks Master
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Whoever diagnoses it will have to have a wiring diagram and look at the heater fan circuit, in order to trace the problem.
Free wiring diagrams for every make and model:

Posted on Jan 04, 2014

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Posted on Jan 02, 2017

SOURCE: Heater fan motor wont run on high

Replace your fan motor resistor.

Posted on Nov 08, 2008

  • 61 Answers

SOURCE: Heater/AC fan motor keeps running after car is shut off

that's normal when hot, but should't run down the battery. if severly overheats ffnd/fix that problem. the other will probably dissapear . if not excessively hot then the fan heat sensor is faulty....

Posted on Jul 22, 2009

  • 1 Answer

SOURCE: 1991 Olds 98 Elite heater blower motor continues

if you haven't got your blower fan fixed yet, im sure it to be the same as mine, the blower motor relay which is out on the firewall under the big fuse block. take plastic cover off over the fuses and move the fuse block out of the way and you will see it staight under that. should be two screws holding it on.

Posted on Apr 07, 2010

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For more help, I suggest you to go through the troubleshooting links mentioned below:-----

Click the link below: ------

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These will help.

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Nov 27, 2012 | Cars & Trucks

1 Answer

Why won't my heater shut off? I can dial the fan down to the lowest blower setting, but it won't shut off at the Off button. The temp. is therefore set at 83 degrees. The modes work i.e., floor, defrost,...


If the ventilation system is set on any setting other than off (I'm talking about the vent, heat, defroster, ac, etc) the fan motor will automatically run at low unless yo select a higher setting. To get the fan OFF, turn off the ventilation system by selecting OFF.

I trust this response answers your question ...

Thank you for your interest in FixYa.com

Mar 02, 2011 | 1999 Oldsmobile Intrigue

1 Answer

I can't get my blower on my heater to shut off it actually sounds like the defrost is running with the car shut off and the key out of the ignition


could be your blower motor relay is stuck usually a gray box like thing next to all the fuses.remove it and fan will stop.

Jan 11, 2010 | 1990 Buick Electra

1 Answer

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begine with a test of the motor first,do this with a test light,under the glove box is your blower motor,turn the key on and heater fan and defrost,now ground the test light to a good ground and test the wires to motor,if you have power replace the motor.

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your blower motor has gone bad and it over heats and shuts down

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Fan continues to run after heater is shut off


sounds like a faulty blower motor resistor.

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