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Why would a 1989 Cadallic heater motor run with the switch in the off position?


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Wiki User
2004-12-27 11:09:31
2004-12-27 11:09:31

This is normal on GM vehicles. The motor always runs at a very low speed.

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On most makes of cars this problem is fixed by replacing a blower motor resister and not the switch.

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The heater blower motor speed resister is burned out.

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most likely it is your blower motor switch in your heater panel in your dash. the switch is burnt in the on position. replace switch from auto part store; if the switch keeps burning out it is due to the brushes in the blower motor being worn out. replace motor

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It could be the high speed heater motor relay is stuck on or the switch itself is broken.

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The wiper motor has a switch inside of it. When they are turned off and the wipers go to the down position it trips the switch in the motor that tells the computer they are in the down position. If that switch in the motor is faulty, the wipers are repositioning until the switch is tripped to the off position. THE FIX.... Replace the wiper motor.


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