Blower Motor Switch Resistor

The A/C blower motor resistor assembly operates in the following manner:
- The heater blower motor switch resistor assembly is located on the passenger side of the A/C evaporator housing behind the glove compartment.
- Three resistance elements are mounted on the resistor board to provide four A/C blower motor speeds.
- Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
- An overheating protective device (thermal limiter) prevents heat damage to the A/C evaporator housing.
- Overheating of the resistor coils can occur when the system airflow is stopped or reduced as a result of the A/C blower wheel becoming locked or unable to turn freely.