fresh air fan bad resistor?, defrost fresh air |
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fresh air fan bad resistor?, defrost fresh air |
Medtner3 |
Jan 21 2022, 10:52 PM
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#1
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Member Group: Members Posts: 180 Joined: 7-July 20 From: Cedar Park Member No.: 24,467 Region Association: None |
update: well, the fan was working now not even that is working. I think I might have fried the motor when I was hooking up the leads to test the fan through the resistor prongs I accidentally let the pos and neg cross ... when it rains it pours not going well today
Edited: I took my fresh air box fan out of the car and tested with a 12 V battery and it spins and works. But the resistor does not seem to work: I put 12V positive lead on the upper right pole where power comes in ( I get 11.84 volts on this terminal when the ignition was on) . ... as I understand it the other three poles are ground for the three fan speeds? So I connect each one to ground and the fan does not work assuming I am testing correctly>>>> can you rebuild a resistor or perhaps clean it with contact cleaner and make it work again https://forums.pelicanparts.com/porsche-911...ower-motor.html https://forums.pelicanparts.com/porsche-914...roster-fan.html |
Dustin |
Jan 22 2022, 05:30 PM
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#2
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Member Group: Members Posts: 111 Joined: 19-August 10 From: Woodland Hills, CA Member No.: 12,072 Region Association: None |
Resistors don't tend to fail. When they fail they burn. If a resistor fails you have a bigger problem somewhere else causing current to that resistor to be too high. Do you have a picture?
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Medtner3 |
Jan 22 2022, 05:33 PM
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#3
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Member Group: Members Posts: 180 Joined: 7-July 20 From: Cedar Park Member No.: 24,467 Region Association: None |
Resistors don't tend to fail. If a resistor fails you have a bigger problem somewhere else causing current to that resistor to be too high. Okay but doesnt make sense one prong pos from battery and one neagtive/groudn to any of three other prongs to the resistor the fan should come on. If I put pos and neg direct to the fan it was working then stopped working I may have crossed the leads and fried it I dont know So it has to be the resistor unless there's something wrong how I am testing it |
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