Standard Motor Products RU504 Blower Motor Resistor

The Standard Motor Products RU504 Blower Motor Resistor is a direct-fit replacement component designed to restore proper HVAC function by controlling the electrical current flowing from the fan switch to the blower motor. This precision-engineered resistor allows you to adjust your heating and air conditioning fan speed settings, replacing damaged or worn original equipment that may have failed due to excessive heat or high current draw.

Key Features:

• Direct-fit OE replacement design for easy installation
• Manufactured with high-quality ceramics and copper electrical connectors for accurate resistance values
• Tin-plated steel terminals ensure maximum electrical contact and reliability
• Engineered to meet or exceed OEM specifications for dependable, maintenance-free operation
• Designed to withstand high operating temperatures and prevent premature failure
• Manufactured in IATF 16949-certified North American facility
• Tested for proper draw, resistance, and RPM performance

Standard Motor Products is a leading supplier of professional-grade automotive components with over 40,000 products for complete vehicle coverage. Each blower motor resistor undergoes rigorous quality testing including 48-hour load tests to ensure long service life under all operating conditions. When your HVAC system only works on high speed or fails completely, the RU504 restores variable speed control to keep you comfortable in any weather.