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  #1  
Old 01-22-2013, 09:42 PM
commandersavage2 commandersavage2 is offline
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Help! stuck without heat in sub-zero temperatures!

Hi all. New to the forum. My heat recently took a dump on me, and i have come to a conclusion that the problem is either the blower motor resistor, or the blower motor itself. i have the dual auto climate control. Wondering if the resistor is the same part for all sub models of the commander that year? any input will be greatly appreciated. 2007 commander. 4.7L
thanks, Ryan.
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Old 01-23-2013, 11:55 AM
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I doubt the auto climate controls use simple resistors like the manual systems do. It probably uses a "module" of sorts in the air duct ahead of the blower to sense air temps and make adjustments.

I would start by checking the blower motor to see if it's the problem. This should be the easiest to check by just disconnecting its plug and jumping it to a 12V source.

Good luck searching!
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Old 01-23-2013, 04:00 PM
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Does it blow cold air with the heat turned on?? Could be a bad heater core. I hope that's not the problem and its just the resistor cause they are a pain to replace. Nothing you would want to do yourself.
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Old 01-23-2013, 07:24 PM
commandersavage2 commandersavage2 is offline
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It does not blow air at all. Was working fine when i drove to work Monday, then when i got out, the fan would not come on. can still hear all the ducts move when i change it to other settings like, defrost, just on the feet, etc. stumped. Any idea on how to test the motor?
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Old 01-24-2013, 10:57 AM
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Just like Lekmedm said, disconnect the plug to the motor and run two wires from that to the battery + and -. I did this for my rad fan in the wifes old GC and found it to be bad.
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Old 02-23-2014, 07:42 AM
commandersavage2 commandersavage2 is offline
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Hey all. I know this thread is old, but my blower is stll on the Fritz. It only works when it wants to. And when it does, it is only on high AND I CAN'T SHUT IT OFF. I can change where it blows, but it won't turn off. That's WHEN it decides to work. Anybody have any suggestions? Could it possibly be the ambient air temperature sensor? Or do you think my resistor just grenaded?
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Old 02-23-2014, 11:24 AM
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Alright change the blower motor resistor in the glove box and you should be golden the auto climate one is about $50
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