Blower Motor Switch Resistor
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The blower motor resistor has the following features:
- It is located on the evaporator core housing in the engine compartment.
- Three resistance elements are mounted on the resistor board to provide 4 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.
- A 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 repairable.