i have a 1994 bmw 325i 4 door, and my heat and ac just stopped workin, the speed 1-3 didnt work and it worked on 4, and now nothin works i think i need a motor resistor wsitch i need help finding it i know its in tha glove box somewhreHow do you change a blower motor resistor in a 1994 bmw 325i?The resistor pack is at the left lower side of the blower/evaporator. To replace, remove the left lower dashboard cover/trim, remove knee protector/trim that covers the blower assy., detach connector and pull out resistor pack.
I agree that the resistor is bad if 1-3 did not work previously but 4 still did (because power goes thru the resistor for 1-3 but goes directly from the switch to the blower motor for 4).
But if 4 no longer works, then you may have something wrong in addition to the resistor.
Replace the resistor pack first. Usually, this corrects the problem. If still inoperative, then check the fuses, relay, fan switch, and ultimately the blower motor.
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