Understand 5 Pins Heater Blower Motor Resistor For Buick Chevrolet Pontiac 52417217 ACDelco 15-81727 GM Air Conditioning Blower Control Module information in Guangzhou Huayang Auto parts Ltd company, ...

The heater blower motor reduces or increases the amount of air blowing through the dashboard vents based on the fan speed selected or, in an automatic climate control system, the interior ...

Different vehicle, but this happens about every 2 years on my old BMW. In my case, there is a module called a "Final Stage Resistor" which supplies current to the blower motor.