Blower Motor Resistors

All Pro Truck Parts carries blower motor resistors for heavy-duty truck HVAC systems. The resistor controls fan speed by regulating voltage to the blower motor — a failed resistor typically means the blower only works on high or not at all. We stock replacement resistors for the most common Class 6 through Class 8 truck platforms.

Visit our help center if you need help finding the correct blower motor resistor for your truck.