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1990 300e Blower/Fan problem (running only when car is OFF)

1138 Views 5 Replies 4 Participants Last post by  Julian0922
Hi, I did not find an answer after searching for a bit, so I have to open a topic and hope somebody can give me at least a hint:

I own a 1990 300e and the blower fan ONLY works when the car is shut off, as soon as I start the car the fan stops running....

What might be the cause? Battery, the ghost in the machine or...:surrender:? A shortage I would exclude, because otherwise it would do it only sometimes, but it does it EVERY time...and with that I mean hundreds of times. Just that in the autumn and winter a working fan is necessary up here...(WA)

Thanks in advance for the help.... :bowdown:
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Quote: I own a 1990 300e and the blower fan ONLY works when the car is shut off, as soon as I start the car the fan stops running....

Do you mean that the blower fan runs only when the *engine* is off but the key is in run and then stops running when you start the engine?
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