Blower Motor Resistor

The blower motor resistor:

• is located on the heater core and evaporator core housing near the blower motor.
• has three resistor elements mounted on the resistor board to provide four blower motor speeds.
• depending on the blower motor switch position, series resistance is added or bypassed in the blower motor circuit to decrease or increase blower motor speed.
• has an overheating device (thermal limiter) that will open the resistor when the temperature reaches approximately 220° C (428° F), interrupting the blower motor operation in all speeds except high.
• is serviced as an assembly. The thermal limiter cannot be reset and is not serviceable.