Quote:
Originally Posted by wbrian63
92 300SE
I think my A/C blower motor is headed for the great beyond.
On high fan setting, it draws about 35A. Is that too high, or OK? Can't find anywhere on AllData, or in my other documentation that gives me a clue.
I replaced the speed control with one of those advertised here on the site. However, when the fan runs for a long time on high, I smell a "cooking resin" odor in the air.
The smell is not of burning wire, its coming from the resin used to pot all of the electronics in on the control. I've pulled the filter cover off and sniffed to compare.
The wires all look OK - none shows signs of being hot, nor do they get excessively hot to the touch when the fan is on max.
So - what's the story - what should max amp draw be??
Thanks
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If you run the blower on 'high', there's very little power dissipation in the regulator. . it's very low. The MAX power dissipation point is when the blower is a little below half speed. This is the point of the greatest heat generated in the regulator.
So if you smell something at high speed it shouldn't be the regulator.
Your car should have a 30amp fuse for the blower and, it draws about 25amps max, typically. If you measured "35amps", something is amiss?? You should have blown the fuse??? Did you actually measure that current (35amps)??