What causes a heater fan to stop working?
Blower motor resistor / control module problems The most common symptom of a failed blower motor resistor is when the heater fan only runs at the highest speed setting (4 or 5) and doesn’t work at low speeds. In some cars, a failed blower motor resistor can cause a heater fan to stop working completely.
Is there a fuse for the heater blower?
The blower motor is powered by a fuse-like device called a relay. If your heater or air conditioner does not blow air through the vents, this could indicate that the blower motor fuse has probably blown. While replacement is easy, the exact location of your blower motor fuse may vary from vehicle to vehicle.
Why is my BMW not blowing air?
In BMW cars, the blower motor resistor often overheats due to incorrect current measurements implemented during the design and engineering of the vehicles. This can cause the HVAC fan to not work at all due to motor failure, and it is unable to blow any air out of the vents.
Is there a fuse for blower fan?
Fuse Protection To protect the blower motor power circuit, a 20-, 25- or 30-amp fuse is usually located in the fuse panel under the dash. The rating of the fuse will depend on the vehicle application and how much power the blower motor requires at full speed.
How can you tell if a blower fuse is bad?
If you hear that the blower motor is operating but don’t feel any air flowing through the vents, the problem is with the airflow controls [source: RepairPal]. If the blower motor isn’t running you should: Use voltmeter or ohmmeter to check for a blown fuse.
How much is a blower motor for a BMW?
The average cost for a BMW 328i blower motor replacement is between $444 and $488. Labor costs are estimated between $119 and $150 while parts are priced between $325 and $338.
Where is the fuse for heater blower motor?
Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.
How do I know if my radiator fan is broken?
These are the most common signs of a faulty radiator fan assembly in need of replacement:
- Engine Overheating. When the radiator fan isn’t functioning properly, it is not able to adequately cool down the car’s engine.
- Air Conditioner Function Diminished.
- Loud Noise Coming From Radiator Fan.