Blower Motor Resistor Replace on 2001 Ford Expedition. Heater and Air Conditioning Blower Fan works on high settings only. Lower settings do not work. HVAC. Switch. Haynes. Chiltons. Lincoln Navigator too. If fan is working on high, then chances are your fan is fine. It is your blower motor resistor (99%) or your switch (.5%) or the wiring in between (.5%).
Blower, Motor, Resistor, Ford, Expedition, 2001