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heater motor


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buickproblems
New User

Dec 15, 2008, 7:50 AM

Post #1 of 3 (1583 views)
heater motor Sign In

93 Buick park Ave 3.8 V6 180,000 miles. Very cold here -5 F when problem started. Need a good place to start looking for answers. Heater blower fan motor will not shut off. Can shut car off (key switch, and remove key) Blower motor still runs. I unplugged the power wires to the blower motor so battery won't go dead ( this killed power to motor). Is it a relay or a short circuited wire???? Any help would be great!!! Thanks!!!


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Dec 15, 2008, 5:41 PM

Post #2 of 3 (1570 views)
Re: heater motor Sign In

Does the ignition switch 'feel' normal while turning to "on", "start", and back? Just had one today (1990) that turned out to be the ignition (electrical) switch. (not the key/tumbler) Funny, but it had the same symptom...blower motor would not turn off.
Loren
SW Washington


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Dec 17, 2008, 4:45 PM

Post #3 of 3 (1562 views)
Re: heater motor Sign In

Well, this is a bit embarrasing, but we mis-diagnosed that heater blower motor problem. It turned out to be the heater blower motor resistor. GM calls it a module. It's mounted just below the relay/fuse block that is on the firewall, and bolted into the heater box. Retails for $260.00.
Loren
SW Washington






 
 
 






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