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Re: Blower motor Issue
Hmmm ...ok...we need to diagnose the brain...check fuses and relays ..anything related to a/c heat blower motor and power to head unit /blower resistor blower.... and advise..also... get code check to see if a soft code stored telling us the cause..... advise
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You can make sure all the wiring to motor is in good shape and not disconnected....The motor has a relay,fuse ,and a blower motor resistor..This is normally the problem...However make sure the dash control is working...
The heater and a/c system have several components as the control switch, the relay, the blower resistor and then the blower. First, you will need to test power at the blower when this happens to see if the blower motor is receiving power or not to determine if this is a blower motor issue or a power supply issue to the motor first.
BEST TO LET BMW DEALERSHIP REPLACE HEATER BLOWER IF NOT MISTAKEN YOU HAVE TO DISCHARGE AC SYSTEM TO REMOVE REFRIGERANT LINES TO REMOVE BLOWER MOTOR COVER.THIS IS NOT HOME FIX.BMW CARS NOT EASY TO WORK ON.YOU HAVE TO BE BMW MECHANIC TO WORK ON THEM.
try tapping the bottom of the blower motor with the blower motor speed selector turned to high and the key on. If the blower motor starts working replace it.
Another thing you can try is unplugging the blower motor and supplying your own power and ground wires to the blower motor. It doesn't matter what pin on the blower motor you supply power or ground. It will work either way. If it doesn't than replace the blower motor. If it does you might have a bad control head.
You could also have a bad blower motor relay or blower motor fuse located in the underhood fuse block. There should be power at the dark blue wire at the blower motor with the key on and the fan speed set to any position.
do you have power to it..or a bad ground around blower motor? is the head unit not signaling the blower to run?...calling it with A/C or heat or just fresh air ..try all settings and advise...good luck