Keep your cabin fan's speed settings working the way they should with the Dorman HVAC blower motor resistor kit 973-433, which pairs a new resistor with a harness pigtail to replace an overheated or corroded original equipment resistor. It fits many vehicles, among them the 1992-1999 Buick LeSabre, 1991-1999 Buick Park Avenue and 1992-1999 Oldsmobile 88. See the "Vehicles it fits" section for the full list and engine details.
In the blower circuit, the resistor lowers the voltage that reaches the blower motor on the lower fan settings, so the HVAC system can run the fan at more than one speed.
- Direct replacement: this resistor and harness kit is designed to directly replace the original equipment on the listed applications.
- Complete kit: every kit comes with a resistor and a harness pigtail, which Dorman notes is essential for most repairs.
- OE-like performance: made to perform like original equipment, helping bring back full HVAC fan operation when a failed resistor is the cause.
- Engineering support: backed by Dorman's team of engineers and quality specialists in the USA.
Signs this part may need replacing include a blower that runs only on its highest setting, missing fan speeds, or a blower that will not run at all. A switch, motor or wiring fault can cause similar symptoms, so diagnose the cause before replacing parts.
Interchange: 4P1486 · RU859 · 20065 · 19113258 · RU46 · JA1619
This part cross-references / interchanges with the following part numbers:
4P1486, RU859, 20065, 19113258, RU46, JA1619
Frequently Asked Questions
What does a Dorman blower motor resistor do?
It lowers the voltage reaching the blower motor on the lower fan settings, so the HVAC system can run the fan at different speeds. The 973-433 is designed to replace an overheated or corroded original.
What comes in the Dorman blower motor resistor kit?
Each 973-433 kit includes a resistor and a harness pigtail. Dorman notes the pigtail is essential for most repairs.
What are the signs a blower motor resistor may need replacing?
A blower that runs only on high, skips speed settings or will not run at all can be signs of a failed resistor. A switch, motor or wiring fault can cause the same symptoms, so diagnose first.
Does the 973-433 fit a 1992-1999 Buick LeSabre?
Yes, it is listed for the 1992-1999 Buick LeSabre, the 1991-1999 Buick Park Avenue and the 1992-1999 Oldsmobile 88. See the "Vehicles it fits" section to confirm your vehicle.
How is the 973-433 installed?
It is designed as a direct replacement for the original equipment on the listed applications. Follow your vehicle's service information for access and removal steps.
