Blower Motor Resistor for 1993-1997 Volvo 850 - Standard Ignition RU-511

If the fan in your heater and A/C won't change speeds because of a failed resistor, the Standard Ignition blower motor resistor for the 1993-1997 Volvo 850, part number RU-511, is designed to bring back variable blower speed control. It is a direct-fit replacement for the 1993-1997 Volvo 850 and was designed specifically for Volvo applications. See the Buyer's Guide tab for engine-level fitment details.

• Copper electrical connectors: Premium copper connectors are used to provide more precise resistance values. This is intended to improve resistor performance and give the part a longer service life.
• HVAC integration: Standard Ignition's research and design process aims for seamless integration with the vehicle's HVAC system.
• Variable speed control: Designed to restore variable speed control to the A/C and heater blower motor, which helps optimize HVAC performance and passenger comfort.
• Tested in-house: The resistor undergoes extensive testing at Standard Ignition's facility to confirm correct performance in all conditions.

The blower motor resistor controls the current that reaches the blower motor. This is what lets the fan run at its lower speed settings instead of only at full output. Signs this part may need replacing include a blower that runs only on its highest setting, one or more fan speeds that no longer work, or a blower that doesn't run on some settings. A worn blower motor, a faulty switch, or wiring problems can cause similar symptoms, so diagnose the cause before replacing the resistor.

Interchange: RU1204 · JA1696 · BR414 · 9137937 · 91379370