Manage your heater and A/C blower speeds with the Four Seasons HVAC Blower Motor Resistor / Switch, part number 20378. It is a direct-fit replacement for the listed applications, the 2003-2008 Pontiac Vibe and the 1998-2002 Chevrolet Prizm. Four Seasons lists this part under both names, HVAC Blower Motor Resistor and Switch.
A blower motor resistor varies the resistance in the blower motor circuit, which lets the HVAC fan run at the different speed settings selected on the climate control. This Four Seasons switch is engineered and tested with years of trouble-free operation in mind. It is backed by more than 50 years of mobile A/C experience.
- OE-style connectors: connectors styled after the original equipment.
- Quality contacts: help ensure proper conductivity.
- Precision engineered: built to precise standards.
- Vehicle-specific: made for the listed applications.
Signs this part may need replacing: the blower runs only on its highest setting, or one or more of the lower fan speeds stop working. Other faults in the HVAC circuit can cause similar symptoms, so diagnose the cause before replacing. If a failed resistor is the cause, this unit replaces it. For the full list of vehicles, see the "Vehicles it fits" section.
Interchange: 1580202 · 973186 · 973545 · 52475256 · 88970279 · 88973260 · 89018516 · 1712684 · A06728 · MT18050 · DR754 · DR763
This part cross-references / interchanges with the following part numbers:
1580202, 20378, 973186, 973545, 52475256, 88970279, 88973260, 89018516, 1712684, A06728, MT18050, DR754, DR763
Frequently Asked Questions
What does part 20378 do?
It is an HVAC blower motor resistor. It varies the resistance in the blower motor circuit so the heater and A/C fan can run at different speed settings.
Is this the right 2003-2008 Pontiac Vibe switch?
Part 20378 is a direct-fit replacement for the 2003-2008 Pontiac Vibe. Check the "Vehicles it fits" section to confirm it fits your vehicle.
Does it fit the 1998-2002 Chevrolet Prizm?
Yes. It is listed as a direct-fit replacement for the 1998-2002 Chevrolet Prizm.
What are signs a blower motor resistor may need replacing?
Common signs are a blower that runs only on its highest setting, or lower fan speeds that no longer work. Other circuit faults can cause similar symptoms, so diagnose the cause first.
What features does this resistor have?
It has OE-style connectors and quality contacts for proper conductivity. It is precision engineered for vehicle-specific applications.
