Dorman 973-571 HVAC Blower Motor Resistor Kit

Dorman 973-571 HVAC Blower Motor Resistor Kit

Dorman 973-571 is an HVAC blower motor resistor kit that replaces an overheated or corroded original resistor and restores blower speed control. It includes the resistor and a harness pigtail for a direct repair on select Dodge Sprinter 2500 and Sprinter 3500 models.

• Includes a blower motor resistor and wire harness pigtail
• 4-wire design with blade terminals and a female connector
• 11.81-inch wiring harness length
• Built for HVAC blower motor resistor replacement on select Sprinter applications
• Direct-fit service part for electrical connector repair at the blower resistor circuit

Application Details

Compatible with 2007-2009 Dodge Sprinter 2500, Main Unit and Roof Mounted Fan, and 2007-2009 Dodge Sprinter 3500, Main Unit and Roof Mounted Fan. This Dorman 973-571 blower motor resistor kit is a practical repair for HVAC systems that have lost one or more fan speeds due to heat damage, corrosion, or connector wear. It cross-references Standard Ignition RU-778 for the same application.

Common Repair Symptoms

• Blower motor works only on certain speed settings
• HVAC fan stops responding at lower or higher speeds
• Heat-damaged resistor connector or pigtail
• Corrosion at the blower resistor electrical connection
• Intermittent cabin airflow control in Dodge Sprinter 2500 or Sprinter 3500 models

Installation Notes

Inspect the blower resistor connector, terminals, and surrounding wiring before installation. Replace any heat-affected or corroded terminals as needed, and verify the harness routing matches the original layout. Confirm the vehicle application by year, model, and HVAC configuration before service.

Quality Assurance

Dorman supplies service replacement parts for vehicle electrical and HVAC repairs, and this kit is built to replace the original resistor and pigtail on the listed Sprinter applications. Use the part number 973-571 to verify the correct replacement before installation.