Blower switch, Hi or Off, no in between

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edw

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My daughter is having a problem with her 1989 325i. The blower switch no longer has the 4 or 5 speed options, its the highest speed or off, nothing in between. I have heard that the multi-position switch is actually not the culprit but rather a resistor board. I have also heard that the board is accessable only from the engine bay, through a removable cover. I originally was under the impression that the multi-position switch was nothing more than a rheostat. With the car 300 miles away at college, I'd like to have the parts on hand to fix this thing during the Thanksgiving holidays. I sure would appreciate any enlightenment on this problem. Is it the switch or is it a resistor board? Is anyone familiar with the degree of difficulty?

Thanks
 
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chadfarrell

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its probably the resistor, which is located in the left hand side of the passenger foot well as i recall. its pretty easy to access should it be in the area mentioned.
 
jrt67ss350

jrt67ss350

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chadfarrell said:
its probably the resistor, which is located in the left hand side of the passenger foot well as i recall. its pretty easy to access should it be in the area mentioned.
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It is the resistor that is bad, but this is absolutely NOT where it is located.

The fan switch in the car is not a rheostat - it is just a simple switch. You need to replace the resistor board - it is located adjacent to the blower motor and is accessed through the blower motor cover on the firewall from the engine compartment. Here's a writeup with some pictures. It's an easy job.
 
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