Holstein Parts 2BMR0538 HVAC Blower Motor Resistor for Ford, Mercury

The Blower Motor Resistor is an electrical component that is a part of the vehicles interior heating and air conditioning system. It is responsible for controlling the blower motors fan speed. When the fan speed is changed via the dash controls, the blower motor resistor is what changes the speed of the blower motor. A failed blower motor resistor can cause issues with the operation of the entire heating and air conditioning system. Usually a bad or failing blower motor resistor will produce a few symptoms that can alert the driver of a potential issue.