BWM 735i Air Conditioner and Heater blower not working any suggestions? I purchased the car used and the air conditioner never really worked well. Now it doesn't work at all and my heater blower is not working so I can't defrost my windows.

I woild be checking the vent controls as if the ac is working and the core was blocked then the air would be cool when the heat was selected but not changing Fixing the heater has resulted in a /c not being good enough to cool the air if the vent is not properly selecting. The point is that if the vent selection is not working properly (vacuum hoses) then the 2 faults will be related.

I would replace the blower motor resistor first then see if that corrects this. The resistor is located next to the blower motor under the dash.

under the dash on passenger side - -
may not be the blower motor tho

does the heater work?if not it could be as simple as a fuse. OR the blower motor went bad.If the heater does work it has something to do with the air conditioner.I hope this helps

First check the voltage at the front blower moter. If it has voltage then it may just need a new motor.

if the air started to work only on a few settings then the problem is your blower motor resistor if it just stopped all of a sudden then the blower motor is bad but the first thing i would check is the fuse. always check fuses first if you find a bad fuse for it and it pops rite after you put it in and turn the heater on then replace the blower motor

It could be a fuse, or the blower motor resistor.

Quick tip that might help. Under the glove box is the blower fan, check the plugs that run to it make sure they have a good connection. then give the blower fan a little tap, mine was just stuck. could have been from dust or something. Or a plug might have been loose.

open glove box and make sure that none of the papers from that can get down to blower motor

check the blower motor fuse or possible bad blower motor