Heater Blower Motor Resistor
WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The heater blower motor resistor (19A706) has the following features:
- The assembly is located in the passenger compartment on the heater core and evaporator core housing (19850) next to the blower motor assembly (19805).
- Three resistor 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 A/C blower motor circuit to decrease or increase A/C blower motor speed.
- An overheating device (thermal limiter) will open the resistor coil when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except high.
- The thermal limiter cannot be reset and is not serviceable