Take back control of your cabin airflow with the Standard Ignition HVAC Blower Motor Resistor RU-686. This resistor manages the current sent to the blower motor so the fan can run at its different variable speeds, and it drops in as a direct-fit replacement for the 2003-2006 Dodge Sprinter 2500, 2003-2006 Dodge Sprinter 3500, 2003-2006 Freightliner Sprinter 2500, and 2003-2006 Freightliner Sprinter 3500. If a failed resistor is the reason your blower only works on one setting, this restores the A/C and heater blower motor's variable speed control.
- Premium copper connectors: use copper electrical connectors for more precise resistance values, helping resistor performance and part life.
- HVAC integration: a research and design process aimed at seamless integration with the vehicle's HVAC system.
- Speed control restored: helps optimize HVAC performance and passenger comfort by returning blower motor speed range.
- Application-specific: designed for Dodge and Freightliner applications and tested at the facility for correct performance.
See the Buyer's Guide tab for engine-level fitment details.
Interchange: RU1375 · 5133432AA · JA1479 · BR586
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this blower motor resistor do?
It manages the current supplied to the HVAC blower motor, allowing the fan to run at its different variable speeds for both A/C and heater settings.
Which vehicles does the RU-686 fit?
It's a direct-fit replacement for the 2003-2006 Dodge Sprinter 2500 and 3500, and the 2003-2006 Freightliner Sprinter 2500 and 3500. See the Buyer's Guide tab for engine details.
What are signs this resistor may need replacing?
A blower that only works on one speed (often only high) or doesn't work at some settings can signal a failed resistor. Diagnose the cause before replacing.
What interchange numbers does it replace?
It cross-references RU1375, 5133432AA, JA1479, and BR586.
What connectors does it use?
It uses premium copper electrical connectors for more precise resistance values, which helps resistor performance and part life.
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