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Four Seasons 20034 Engine Cooling Fan Switch
| Brand | Four Seasons 20034 |
|---|---|
| Connector Color | Gray |
| Connector Gender | Female |
| Description | Switch-Temp /Engine Mount |
| Fan Open/Closed | Open |
| Fitting Gender | Male |
| Fitting Thread Size | M16-1.50 |
| Material | Brass |
| Meets / Exceeds OEM? | YES |
| Mnt Sys Loc | Engine Mounted |
| Style | Temperature |
| Terminal Quantity | 2 |
| Type | Cooling Fan |
| Product line | Temperature Switch |
| Fits | Toyota · 11 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable fit and function.
Brass construction. Offers durable performance in a temperature switch.
Engine-mounted design. Built as a cooling fan switch for temperature-based control.
Cross-references Four Seasons 20034, 50846 and 207983 for the same application. See all 10.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Engine Cooling Fan Switch for Toyota Applications
Four Seasons Temperature Switch 20034 is an engine-mounted cooling fan switch built for direct temperature-based fan control. It uses a gray female connector, 2 terminals, and an M16-1.50 male thread with a brass body for the specified cooling system applications.
Compatible With Toyota Sienna, Avalon, and Camry applications that use an engine-mounted temperature switch, including Toyota Sienna cooling fan switch service and Toyota Avalon switch block locations. Four Seasons 20034 meets or exceeds OEM requirements for the listed fitments.
Key Features
- Brand: Four Seasons Temperature Switch
- Part number: 20034
- Engine-mounted cooling fan switch design
- Gray female connector with 2 terminals
- Male fitting with M16-1.50 thread size
- Brass construction
- Open fan state configuration
- Meets or exceeds OEM specifications
Product Details
This Four Seasons temperature switch is used in engine cooling fan control circuits where coolant temperature triggers fan operation. The brass sensor body and threaded male fitting support installation in the specified engine-mounted locations, while the 2-terminal electrical connection matches the listed Toyota cooling system and HVAC-related applications. Four Seasons 20034 is referenced for Toyota Sienna, Toyota Avalon, and Toyota Camry fitments where the original switch uses the same connector and thread configuration.
This part cross-references A87983 and SW1437 for the same application.
Common Symptoms It May Address
- Cooling fan not switching on at the correct temperature
- Cooling fan staying on longer than expected
- Temperature-related fan control faults
- Intermittent fan operation from a worn switch
- Incorrect coolant temperature signal at the fan circuit
Installation Notes
- Verify the connector style, terminal count, and M16-1.50 thread before installation.
- Confirm the vehicle uses an engine-mounted temperature switch in the listed location.
- Match the application notes for Toyota Sienna, Avalon, or Camry before replacement.
- Inspect the connector and surrounding cooling system components for corrosion or damage during service.
Quality Assurance
Four Seasons 20034 is built to meet or exceed OEM requirements for the listed applications, supporting reliable replacement in factory-style cooling fan control systems.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Toyota | Sienna | — | — | N/A | Engine mounted coolant fan switch; Temperature Switch |
| 2000 | Toyota | Sienna | — | — | N/A | Engine Mounted; 2 Term.; w/o Trailer Tow Pkg.; Temperature Switch |
| 1999 | Toyota | Avalon | — | — | N/A | Engine Mounted; Position No. 1 In Switch Block; Temperature Switch |
| 1999 | Toyota | Sienna | — | — | N/A | Engine Mounted; 2 Term.; w/o Trailer Tow Pkg.; Temperature Switch |
| 1998 | Toyota | Avalon | — | — | N/A | Engine Mounted; Position No. 1 In Switch Block; Temperature Switch |
| 1998 | Toyota | Sienna | — | — | N/A | Engine Mounted; 2 Term.; w/o Trailer Tow Pkg.; Temperature Switch |
| 1997 | Toyota | Avalon | — | — | N/A | Engine Mounted; Position No. 1 In Switch Block; Temperature Switch |
| 1996 | Toyota | Avalon | — | — | N/A | Engine Mounted; Position No. 1 In Switch Block; Temperature Switch |
| 1996 | Toyota | Camry | 3.0L | V6 | N/A | HVAC Blower Motor Resistor Harness with 2 terminals; Temperature Switch |
| 1995 | Toyota | Avalon | — | — | N/A | Engine Mounted; Position No. 1 In Switch Block; Temperature Switch |
| 1995 | Toyota | Camry | 3.0L | V6 | N/A | HVAC Blower Motor Resistor Harness with 2 terminals; Temperature Switch |
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