Standard Ignition RU-428 HVAC Blower Motor Resistor

Reliable HVAC Blower Motor Resistor for Audi and Volkswagen

The Standard Ignition RU-428 HVAC blower motor resistor is designed to restore proper blower motor function in select Audi and Volkswagen models. Engineered for durability and precise fitment, this resistor ensures consistent climate control performance in your vehicle.

• Compatible with Audi A4, A4 Quattro, S4, and Volkswagen Passat models
• Supports 3-5 speed blower motor operation
• 12-volt electrical rating for standard automotive systems
• Rectangular female connector with 2 cavities and blade terminals (male and female)
• Includes a 3-inch (11.4 cm) wiring harness for easy connection
• Screw attachment method for secure mounting
• Wiring harness included; hardware and mounting brackets not included

Product Details and Specifications

The RU-428 blower motor resistor from Standard Ignition is built to meet OEM specifications for HVAC systems in Audi and Volkswagen vehicles. It features a rectangular female connector with two cavities and blade-type terminals, providing reliable electrical contact. The resistor supports blower motors with 3 to 5 speed settings, ensuring smooth fan speed control. The included wiring harness measures approximately 3 inches (11.4 cm) in length, facilitating straightforward installation. This part uses a screw attachment method, requiring compatible mounting points in the vehicle’s HVAC system. Note that mounting brackets and additional hardware are not included with this resistor.

Common Applications and Problem Resolution

• Restores blower motor speed control in Audi A4, A4 Quattro, S4, and Volkswagen Passat
• Resolves issues with blower motor only working on certain speeds or not at all
• Fixes inconsistent or no airflow from HVAC vents
• Addresses electrical resistance failures causing blower motor malfunction
• Improves climate control system reliability and comfort

Installation Notes and Tips

Installation of the Standard Ignition RU-428 blower motor resistor requires access to the HVAC blower motor housing. Use the screw attachment method to secure the resistor in place. Ensure the rectangular female connector aligns properly with the vehicle’s wiring harness, which is included with this part. Verify that the blade terminals are fully seated to prevent electrical issues. Since mounting brackets and hardware are not included, retain original components or source compatible fasteners as needed. Always disconnect the vehicle battery before installation to avoid electrical hazards.

Quality Assurance and Warranty Information

Standard Ignition parts are manufactured to meet or exceed OEM standards, providing dependable performance for your Audi or Volkswagen HVAC system. The RU-428 blower motor resistor undergoes rigorous quality control to ensure durability and fitment accuracy. This part is backed by Standard Ignition’s limited warranty, covering defects in materials and workmanship under normal use. Refer to the warranty documentation for specific terms and conditions.