When the cab fan stalls on some speeds or stops altogether, this Dorman blower motor resistor, part number 973-189, is a direct replacement designed to match the operation and performance of the original equipment. It fits many vehicles, among them the 2011-2014 Ram 1500, 2009-2010 Dodge Ram 1500 and 2011-2018 Ram 2500. See the Buyer's Guide tab for the full list and engine details.
The resistor works in the blower circuit and helps regulate the current reaching the blower motor. That is how the fan steps between the speeds selected for heating and cooling.
- Direct replacement: Designed to install and operate like the original part on the listed applications.
- Addresses fan-speed faults: If a burnt-out resistor is why your blower runs on only one speed or not at all, this unit replaces it.
- Thoroughly tested: Examined and validated to perform safely and effectively.
- Engineering backing: Supported by a team of engineers and inspectors in the United States.
Signs this HVAC blower motor resistor may need replacing include a fan that works on only one speed, a blower that will not run at all, or a resistor found burnt on inspection. Diagnose the blower circuit before you replace anything, because a worn blower motor, a faulty switch or damaged wiring can cause similar symptoms.
Interchange: 4P1621 · RU1399 · 68048900AA · 68048900AB · 20510 · 2BMR0358 · RU710 · JA1743
This part cross-references / interchanges with the following part numbers:
4P1621, RU1399, 68048900AA, 68048900AB, 20510, 2BMR0358, RU710, JA1743
