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Old Aug 2, 2021 | 10:37 PM
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onehundred80
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Joined: Apr 2006
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From: Ontario
Default Re: Heater fan going full speed all the time

Originally Posted by zip439
Where that center pin wire exits the A/C control module cut that wire a couple inches from the controller connector If it is bundled cut back that wrapper. Now measure the voltage at the wire. Does it change with the rotation of the ****?? Yes, run a new wire to the fan by soldering in a replacement. No, it doesn't change, but is 12v then the A/C control has a problem.
This has been suggested before and is a good logical step in solving the problem, it will be tried first.
Thanks for the reply.
 
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