Ford Escort Blower fan

The fan on my heater / ac unit has 4 settings. When I turn it to 3 or 4 the fan shuts off or "trips." I have to keep pushing the reset button on top of the
fusebox under the dash and then leave the fan on "2." Ford dealer wants $ 72.00/ hr to diagnose the problem. Any suggestions as to what might be causing this overload ? Thanks
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circuit. Or it could be the circuit breaker that you have to reset is bad causing it to trip when it has a good heavy load on it. Does it trip right away? If it doesnt, takes a while, or even a second or two, it probably isnt a short.
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snipped-for-privacy@aol.com (LRESA500) wrote in message

I can't think of anything but a binding motor. Since it's mounted vertically its thrust washers probably take a beating, but it wouldn't surprise me if the felt wicks that hold oil for the bearings have dried out because I found that by lubing them every year I could keep the motor from squealing. This motor is held together by bent tabs, which can break if bent too often, so I drilled holes for screws to replace them. I also clean and lube the thrust washers and clean the commutator. My factory original blower started to squeal in less than a year,
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Try removing the fan and bench testing it.
When I did this I found that the plastic cover was holding in water that had gotten into the vent intake and essentially the motor was under water. I let it dry out overnight and it works fine now. (I recommend that you let it dry out longer if that is the case with yours). I also drilled a small hole in the plasti cover so if any more water gets in it can drain out. I also cleaned out the area between the hood and the windshield to get rid of the leaves and crap that was clogging up the fender drain holes.
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its not tripping out on 1 or 2....so its not going to be the fan.............its more likely to be the resistor pack that controls the reduced voltage when you select a slower fan speed........

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