BMW F30 heater blower malfunctions
F30 heater blower does not work even though the fuses are intact, what could be the cause?
A fault code may point to the blower motor even though the motor itself is fine. Disconnecting and reconnecting the blower connector got the blower working, so the cause can be a poor contact in the connector. Check the connector first.
Why does the F30 heater blow only at low power and the car warns about the battery?
The cause can be the battery. The car limits the blower when it thinks the battery is empty. The fix is to replace the battery and register the replacement in the car. If the new battery is of a different type, it must also be coded.
The blower makes a loud noise or gives no air when parked, is the motor broken?
Strong resonance at higher power can be caused by debris collected in the blower motor. The motor may fail completely, so replacing the interior blower is then necessary.
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