Dorman 973-500 HVAC Blower Motor Resistor Kit

Dorman 973-500 HVAC Blower Motor Resistor Kit

Dorman 973-500 is an HVAC blower motor resistor kit that replaces a failed original resistor and includes the matching harness pigtail for a more complete repair. It is built for vehicles where heat damage or corrosion has affected the blower speed circuit, including Chevrolet HHR, Chevrolet Cobalt, and Pontiac G5 applications.

Key Features

• Direct replacement blower motor resistor kit for HVAC fan speed control repairs
• Includes a resistor and wire harness pigtail for connector-side repair
• 4-wire, 4-terminal design with blade terminals and a female connector
• 6-inch wiring harness length for service replacement use
• Mounts with 2 holes; mounting hardware is not included
• Package contents: blower motor resistor and wire harness
• Cross-reference part numbers include 4P1436 and RU464 for the same application

Detailed Description

This Dorman blower motor resistor kit is made for HVAC systems that have lost one or more fan speeds due to resistor failure or connector damage. The included harness pigtail helps restore the electrical connection at the resistor location, which is a common repair path when the original connector has overheated or corroded. It is a practical replacement for select 2005-2010 Chevrolet Cobalt models without electronic climate control, 2006-2011 Chevrolet HHR models, and 2007-2010 Pontiac G5 models without electronic climate control. The Dorman 973-500 part number is also a useful reference when searching for a blower motor resistor kit for these vehicles.

What It Helps Fix

• Blower motor only working on certain speed settings
• No cabin fan operation from a failed resistor circuit
• Heat-damaged or corroded resistor connector terminals
• Intermittent HVAC blower performance caused by poor electrical contact
• Repair needs after resistor overheating in Chevrolet HHR, Chevrolet Cobalt, or Pontiac G5 HVAC systems

Installation Notes and Tips

Verify the vehicle uses the listed HVAC configuration before ordering, especially on Chevrolet Cobalt and Pontiac G5 models without electronic climate control. Inspect the connector, terminals, and surrounding wiring for heat damage before installation, and replace any damaged wiring as needed. The resistor mounts with two holes, and the harness uses a 4-wire layout with blade terminals and a female connector. Confirm the original connector style and harness routing match the Dorman 973-500 replacement before final assembly.

Quality Assurance

Dorman supplies this kit as an OE-style service replacement for restoring blower motor resistor function and repairing damaged connector ends. The design combines the resistor and harness pigtail to address both the failed component and the common connector-side issue in one repair.