Blower motor will not turn off
05-07-2016, 09:41 AM
#1
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1999 C280
Blower motor will not turn off
I have a 99 C280 that the blower motor will not turn off on even with the ignition key removed. Pulled the fuse for now. Is there also a relay that could be stuck feeding it voltage ?
05-09-2016, 07:23 AM
#2
Out Of Control!!
There is a blower voltage regulator on the blower that may be faulty otherwise the AC control module sends a signal to the regulator to adjust fan speed, the control unit may be faulty!!
05-09-2016, 12:51 PM
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1999 C280
Plutoe, Is the A/C control module/control unit your speaking of, the head in the dash where you select the functions from or a separate unit under the dash or mounted elsewhere and is the regulator an integral part of the blower or is it a serviceable item ? Thank You for your response, much appreciated !
05-11-2016, 12:02 PM
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Well I found what caused the problem. When I started removing the lower heater box cover for the blower motor it had a bunch of water in it due to all the drains being plugged with pine needles ! Water was deep enough that the resistor and lower part of the motor where submersed for who knows how long. Cleaned out all the drains, now to see which part is at fault, control or resistor , , , ,
