Dorman 973-404 HVAC Blower Motor Resistor Kit - Front

Dorman 973-404 HVAC Blower Motor Resistor Kit

Dorman 973-404 is an HVAC blower motor resistor kit for vehicles with manual blower speed control. It includes a resistor and harness pigtail to replace an overheated or corroded original equipment resistor, helping restore proper blower motor operation in Ford E-150, E-250, E-350, F-250 Super Duty, F-350 Super Duty, and Excursion applications.

Key Features

• HVAC blower motor resistor kit for manual climate control systems
• Includes a replacement resistor and harness pigtail
• Blade terminal type for the electrical connection
• Gasket or seal included for the installation area
• Package contents: blower motor resistor and instructions
• Direct-fit replacement for select Ford van and Super Duty truck applications

Detailed Description

This Dorman blower motor resistor kit, part number 973-404, is built for select Ford HVAC systems where the original resistor has failed from heat damage or connector corrosion. It is a practical replacement for Ford E-150, E-250, E-350, F-250 Super Duty, F-350 Super Duty, and Excursion models with the listed manual air conditioning configurations. The included harness pigtail addresses damaged connector terminals at the same time as the resistor, which is important when the original plug shows signs of overheating.

This part cross-references 4C2Z19A706AA and RU445 for the same application.

What It Helps Fix

• Blower motor speeds that stop working on one or more settings
• No cabin airflow from the HVAC vents at certain fan speeds
• Heat-damaged resistor connectors or corroded terminals
• Intermittent blower operation caused by electrical resistance at the connector
• HVAC fan control issues in Ford E-Series vans and Super Duty trucks

Installation Notes and Tips

Verify the vehicle’s HVAC configuration before installation, since fitment varies by year, model, and whether the system uses manual air conditioning controls. This kit is listed for front or N/A positions depending on application, and the included instructions should be followed during replacement. Inspect the blower motor connector and surrounding wiring for heat damage before installing the new resistor and pigtail.

• Fits 2006-2018 Ford E-350 Super Duty, front
• Fits 2005-2014 Ford E-150, front
• Fits 2005-2014 Ford E-250, front
• Fits 2005-2007 Ford F-250 Super Duty, N/A, includes connector; wo/Air Conditioning; w/Manual Air Conditioning Controls
• Fits 2005-2007 Ford F-350 Super Duty, N/A, includes connector; wo/Air Conditioning; w/Manual Air Conditioning Controls
• Fits 2000-2005 Ford Excursion, front, includes connector; w/Manual Air Conditioning Controls
• Fits 1997-2002 Ford E-150 Econoline, front, compatible with vehicles that have Air Conditioning, includes connector
• Fits 1997-2002 Ford E-250 Econoline, front, compatible with vehicles that have Air Conditioning, includes connector
• Fits 1997-2002 Ford E-350 Econoline Club Wagon, front, compatible with vehicles that have Air Conditioning, includes connector
• Fits 1999-2004 Ford F-250 Super Duty, N/A, blower motor resistor kit includes connector
• Fits 1999-2004 Ford F-350 Super Duty, N/A, blower motor resistor kit includes connector
• Fits 1999-2000 Ford E-350 Super Duty, front, compatible with vehicles that have Air Conditioning, includes connector

Quality Assurance

Dorman manufactures replacement electrical and HVAC components for repair applications where the original part has failed. Part number 973-404 is built as a service replacement for select Ford blower motor resistor applications and is supplied with instructions for installation.