Operation - Front

The blower motor (1) is a 12-volt, direct current (DC) motor with a squirrel cage-type blower wheel (2) that is secured to the blower motor shaft (3). The blower motor and wheel are located near the passenger side end of the HVAC housing in the passenger compartment below the instrument panel.

On models equipped with the manual temperature control (MTC) heating-A/C system, the front blower motor will operate whenever the ignition switch is in the On position and the front blower control switch is in any position except Off. On models equipped with the automatic temperature control (ATC) system, the front blower motor will operate whenever the ignition switch is in the On position and the A/C-heater control power is turned on.

Blower motor speed for the MTC system is controlled by regulating the path to ground through the blower motor control switch and the blower motor resistor block. The blower motor receives battery current whenever the front blower motor relay is energized. The front blower motor relay output circuit is protected by a fuse in the integrated power module (IPM) located in the engine compartment.

For the ATC system, blower motor speed is controlled by the blower motor power module which provides the blower motor with power and a path to ground. The blower motor power module also sends a blower control signal to the A/C-heater control. Using input from either the front blower motor control (manual mode ) or sensor data (automatic mode), the A/C-heater control processes the blower control signal from the power module and sets the speed at which the front blower motor will run. The blower motor power module receives battery current whenever the front blower motor relay is energized.

The blower motor and wheel are used to control the velocity of air moving through the HVAC housing by spinning the blower wheel within the housing at the selected speed or, in the ATC system, at the selected or programmed speed.

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.