Dorman Front HVAC Blower Motor Resistor Kit 973-407 with Harness Pigtail — Restores Fan Speed Control, OE Fit

The Dorman 973-407 Front HVAC Blower Motor Resistor Kit is a ready-to-install replacement resistor and harness pigtail designed to restore proper blower fan speed control in compatible vehicles.

If your vehicle's HVAC blower loses some fan speeds or stops working at certain settings, the resistor assembly is often the culprit. This kit from Dorman includes both the resistor and the harness pigtail, making it a straightforward swap for an overheated or corroded original resistor. Engineered and quality-checked in the USA, the kit aims to match the fit and function of the original equipment so you can get your heating and air conditioning airflow back to normal quickly.

How does the Dorman 973-407 repair my HVAC blower issues?

The resistor regulates current to the blower motor so the fan can run at multiple speeds; when it fails, some speeds will stop working or the blower may run only on high. Replacing the resistor and the harness pigtail fixes worn contacts, heat-damaged terminals, and corroded wiring that interrupt the blower motor’s control.

• Replaces failed resistor that causes loss of low/medium speeds
• New harness pigtail restores secure electrical connection
• Matches OE mounting points for straightforward installation

What comes in the kit and what tools will I need?

The Dorman 973-407 kit contains the blower motor resistor and a matching harness pigtail—everything typically required to replace a damaged original resistor assembly. Basic hand tools and minimal vehicle disassembly are usually sufficient for this repair, though exact tools depend on make and model.

• Included: blower motor resistor and harness pigtail
• Common tools: screwdriver, socket set, and pliers for clips
• Vehicle-specific removal steps may require trim tools or a service manual

Will this part fit my vehicle and how do I confirm compatibility?

Dorman manufactures this resistor kit to directly replace the original equipment on select years, makes, and models. To ensure a proper fit, use your vehicle’s make, model and trim level in the product fitment or garage tool before purchasing.

• Check fitment by entering vehicle details in the seller’s garage tool
• Compare the electrical connector and mounting configuration with your original part
• Contact seller support with part numbers or photos if unsure about compatibility

How durable and reliable is the Dorman resistor kit?

The kit is produced under Dorman’s engineering and quality processes in the USA and is intended to perform like the original equipment. While no electrical part is immune to extreme heat or water intrusion, replacing a damaged resistor and pigtail with this kit restores secure connections that reduce failure risk from corrosion and overheating.

• Engineered and quality-checked in the USA by Dorman teams
• New terminals reduce the chance of intermittent electrical contact
• Designed as a direct replacement to match original fit and heat tolerance

Who is this for? The Dorman 973-407 Front HVAC Blower Motor Resistor Kit is aimed at DIY mechanics, independent repair shops, and vehicle owners troubleshooting blower fan speed loss or intermittent HVAC operation. If your blower works only on one speed or the lower settings have stopped, and you want a direct-replacement solution with a new harness pigtail to avoid splicing, this kit provides a practical, engineered option to get your climate control working as intended again.