Blower Motor

Blower motors are responsible for forced-air circulation within a vehicle’s HVAC system. Typically located within the HVAC housing, these multi-speed electric motors drive a fan to move air across the heater core and evaporator, distributing heated or cooled air through the vehicle’s vents. Construction commonly includes a squirrel-cage blower wheel, an electric motor with brushes or brushless design, and temperature-activated control resistors. Performance is rated by cubic feet per minute (CFM) and voltage requirements vary based on vehicle application. Failure modes often include motor burnout, resistor failure, or physical obstruction of the fan wheel.