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#1
02-02-2011, 10:54 PM
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Blower motor regulator symptoms?
I have looked at all the DIY stuff on climate control ,but there is nothing specific on the blower motor regulator/resistor. How do you know if it is bad? I took everything apart lubed the motor bearings spins ok now. But the fan only works in high no auto no low. The fan bearings got squeekie a few weeks ago and I did detect a faint smell of an electrical burning,which eventually went away. To get it to work in auto or low back then you would have to start off in high and work your way down to auto or low. Then it failed altogether.I thought this was due to the motor bearings having a high turning resistance ,but I have since corrected this problem and the fan turns ok now just no auto or low setting??? bad regulator or shoud I get to soldering the ccu joints?? Thanx John................................................................................................ ..
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88 W124 3.0 96 R129 119eng 06 ML350 98 ML320 sold 02 CLK55 amg 
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#2
02-02-2011, 11:37 PM
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That's the usual symptom, high blower speed and nuttin' else. The high resistance probably fried the regulator. I would have replaced the motor, or at least put new brushes in it.
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Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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#3
02-03-2011, 05:40 PM
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88 300 E blower regulator
Thanx Gilly,thats what I thought.
A weird thing happened on the way to work,It started to work in auto and low then it started to cut in and out even in high. If the regulator is bad could it be intermittent or once its gone its gone???
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88 W124 3.0 96 R129 119eng 06 ML350 98 ML320 sold 02 CLK55 amg
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#4
02-03-2011, 05:55 PM
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Could be intermittent, sure. Might pay to look those brushes over now before you spend any money.
__________________
Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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