Designed to manage your heater and A/C fan speeds, the Four Seasons switch 20074 is an HVAC Blower Motor Resistor / Switch that regulates the current reaching the front blower motor, so the fan can run at the speed setting you choose. It fits many vehicles, among them the 1988-1994 Chevrolet C1500, the 1988-1994 Chevrolet K1500 and the 1992-1994 GMC Yukon. It is a direct-fit replacement for the listed applications. See the "Vehicles it fits" section for the full list.
Four Seasons engineers and tests its products to provide years of trouble-free operation, and it draws on more than 50 years of mobile A/C experience. The brand's goal is simple: fix it once and fix it right. Four Seasons describes this part as an HVAC blower motor resistor, and it is also listed under the name switch.
- Precision engineered: built and tested by Four Seasons with precision engineering.
- Vehicle-specific applications: made for the listed vehicles rather than as a one-size-fits-all part.
- OE-style connectors: equipped with connectors styled after the original equipment.
- Front position: cataloged for the front HVAC blower motor.
A blower motor resistor may need replacing if the fan runs only on its highest setting, if lower speeds stop working, or if the fan no longer changes speed. If a failed resistor is the cause, this unit replaces it. Diagnose the circuit first, because a blower motor, control switch or wiring fault can produce similar symptoms.
Interchange: 1580556 · 11120074 · 973537 · 901821 · 15551633 · 1712157 · ACD1580556 · 1232 · A07697 · MT18014 · SW11291 · SW11291C · DR791
This part cross-references / interchanges with the following part numbers:
1580556, 20074, 11120074, 973537, 901821, 15551633, 1712157, ACD1580556, 1232, A07697, MT18014, SW11291, SW11291C, DR791
Frequently Asked Questions
What does the Four Seasons 20074 HVAC blower motor resistor / switch do?
It regulates the current supplied to the front HVAC blower motor, which lets the heater and A/C fan run at the different speed settings you select.
Will this blower motor resistor fit my 1988-1994 Chevrolet K1500?
Yes. The 1988-1994 Chevrolet K1500 is a listed application, as are the 1988-1994 Chevrolet C1500 and the 1992-1994 GMC Yukon. Check the "Vehicles it fits" section to confirm your vehicle.
What are signs a blower motor resistor may need replacing?
Common signs are a fan that runs only on high, lower speeds that no longer work, or a fan that won't change speed. Diagnose the cause first, because other components can produce similar symptoms.
Does the 20074 have OE-style connectors?
Yes. Four Seasons equips this precision-engineered, vehicle-specific resistor with OE-style connectors.
Why is this part called both a blower motor resistor and a switch?
Four Seasons describes part 20074 as an HVAC blower motor resistor, and it is also listed under the name switch. Both names refer to the same part.
