BMW Blower Speed High Only
Q I have a 1991 535i. The blower speed switch only works on High. It is annoying because if you want heat or A/C it has to be cranked all the way up on High. I was wondering what the problem could be.
A The problem of the blower motor only working on the high speed setting is a common issue with the older BMWs, with non-digital control panels. The blower resistor unit has failed. Replacement is generally straight forward and is covered in the Bentley repair manual.
Click here, then ID your model, to see the blower resistor:
Click here, then ID your model, to see the Bentley repair manual: