Standard Motor Products RU878 HVAC Blower Motor Resistor

The Standard Motor Products RU878 Intermotor Blower Motor Resistor is a precision-engineered replacement component designed to restore proper blower motor speed control to your vehicle's heating and air conditioning system. The blower motor resistor regulates the voltage supplied to the blower motor, enabling multiple fan speed settings — from low to high — to function correctly.

Key Features:

• Direct OE-replacement design for precise fit and reliable performance
• Manufactured to meet or exceed original equipment specifications
• Restores full blower motor speed range (all fan speed settings)
• Built with high-quality resistor elements for long-lasting durability
• Part of the Standard Intermotor professional-grade product line
• Plug-and-play installation — no modification required

A failed blower motor resistor is one of the most common causes of a blower fan that only works on one speed or not at all. The Standard Motor Products RU878 provides a reliable, cost-effective solution, helping return your HVAC system to full functionality. Backed by Standard Motor Products' commitment to quality, this resistor is a trusted choice for professional technicians and DIY mechanics alike.