Blower Motor: Description and Operation
BLOWER MOTORDESCRIPTION
Blower Motor - Typical:
The blower motor is a 12-volt, direct current (DC) motor mounted within a plastic housing with an integral wire connector and squirrel cage type blower wheel that is secured to the blower motor shaft. The blower motor wheel is located in HVAC air inlet housing which is mounted to the passenger side end of the HVAC housing.
The blower motor can be accessed for service from underneath the instrument panel.
OPERATION
The blower motor is used to control the velocity of air moving through the HVAC housing by spinning the blower wheel within the HVAC air inlet housing at the selected speed.
The blower motor will operate whenever the ignition switch is in the On position and the blower motor control in any position except Off. Blower motor speed is controlled by regulating the path to ground through the blower motor resistor and through the blower motor control located within the A/C-heater control.
The blower motor and blower motor wheel are factory balanced and cannot be adjusted or repaired. If faulty or damaged, the blower motor and blower wheel must be replaced as an assembly.