What could be the reason my BMW 5 Series heater fan isn't functioning properly?

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Theodore K Mar 16, 2021

There could be a few reasons why the heater blower in your BMW 5 Series isn't working right. Some possible causes are blocked or faulty heating controls, a messed-up thermostat, a water leak, troubles with the heater core, or not enough coolant. All of these things can mess with your heater blower's performance. However, it might just be time to swap out the blower because it's getting old, worn out, or damaged. When this part goes bad, you may feel a bit of warm or cool air coming out of the vents, but the air pressure will be pretty low no matter the fan speed or temperature setting. If you hear a grinding or rattling sound from the passenger side floorboard when you turn on the heater or AC, that's another sign something's up. Replacing the blower motor in this car typically costs around $890 to $1,020, with labor accounting for $500 to $640 of that total.

What could be the reason my BMW 5 Series heater fan isn't functioning properly?

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