Blower

Near blower motor

The heater blower motor switch resistor has the following features:

The assembly is located on the evaporator housing in the engine compartment.
Three resistance elements are mounted on the resistor board to provide four blower motor speeds.
Depending on the heater blower motor switch position, series resistance is added or bypassed in the blower motor circuit to decrease or increase blower motor speed.
An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except HI.
The thermal limiter cannot be reset and is not serviceable.