HomeBelts and Cooling > SwitchesFour Seasons 20034 Engine Cooling Fan Switch
Part #: 20034

Four Seasons 20034 Engine Cooling Fan Switch

Temperature Switch
⚙️ 11 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Temperature Switch
🚗Fitment: Toyota, Sienna, Avalon, and Camry
🔄Easy Returns — Return within 60 days for a full refund
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Reliable Engine Cooling Fan Switch for Toyota Vehicles

The Four Seasons Temperature Switch 20034 is designed to maintain optimal engine temperature by controlling the cooling fan operation. Engineered for Toyota Avalon, Camry, and Sienna models, this engine cooling fan switch ensures precise temperature regulation and reliable performance.

  • Compatible with Toyota Avalon, Camry, and Sienna models
  • Part number 20034 for accurate replacement
  • Engine mounted temperature switch with M16-1.50 male fitting thread
  • Gray female connector with 2 terminals for secure electrical connection
  • Durable brass material construction meets or exceeds OEM standards
  • Designed to open the cooling fan circuit at specified temperatures

About the Four Seasons Temperature Switch Product Line

The Four Seasons Temperature Switch line focuses on precision-engineered switches that regulate engine cooling fan operation based on temperature thresholds. This product line is designed to meet or exceed OEM specifications, providing reliable temperature sensing and fan control for various vehicle applications. The 20034 switch is part of this line, offering a robust solution for engine-mounted temperature sensing in select Toyota models.

Detailed Product Description

The Four Seasons 20034 engine cooling fan switch features a brass body with a male M16-1.50 threaded fitting, ensuring a secure and leak-free installation on the engine mount. The switch uses a gray female connector with two terminals, providing a reliable electrical interface for the cooling fan circuit. This temperature switch operates by opening the fan circuit at the designated temperature, helping to regulate engine heat effectively. Its design and materials meet or exceed OEM requirements, making it a dependable replacement part for Toyota Avalon, Camry, and Sienna vehicles.

Common Applications and Issues Addressed

  • Prevents engine overheating by activating the cooling fan at the correct temperature
  • Resolves intermittent or non-functioning cooling fan problems
  • Eliminates electrical faults caused by faulty temperature switches
  • Maintains proper engine temperature for optimal performance and emissions
  • Replaces worn or damaged OEM engine cooling fan switches

Installation Notes and Tips

  • Ensure the engine is cool before removing the old switch to avoid burns
  • Use appropriate tools to avoid damaging the M16-1.50 threaded fitting
  • Verify the connector color and terminal count match the vehicle wiring harness
  • Check for proper torque specifications to prevent leaks or damage
  • Test the cooling fan operation after installation to confirm correct function

Quality Assurance and Warranty

The Four Seasons Temperature Switch 20034 is manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. Constructed from brass and designed for engine-mounted applications, this switch undergoes quality control testing to maintain consistent operation. Warranty details are provided by Four Seasons and typically cover defects in materials and workmanship under normal use.

BrandFour Seasons
Part Number20034
PositionTemperature Switch
Connector ColorGray
Connector GenderFemale
DescriptionSwitch-Temp /Engine Mount
Fan Open/ClosedOpen
Fitting GenderMale
Fitting Thread SizeM16-1.50
MaterialBrass
Meets / Exceeds OEM?YES
Mnt Sys LocEngine Mounted
StyleTemperature
Terminal Quantity2
TypeCooling Fan

This part fits 11 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2005ToyotaSiennaN/AEngine mounted coolant fan switch; Temperature Switch
2000ToyotaSiennaN/AEngine Mounted; 2 Term.; w/o Trailer Tow Pkg.; Temperature Switch
1999ToyotaAvalonN/AEngine Mounted; Position No. 1 In Switch Block; Temperature Switch
1999ToyotaSiennaN/AEngine Mounted; 2 Term.; w/o Trailer Tow Pkg.; Temperature Switch
1998ToyotaAvalonN/AEngine Mounted; Position No. 1 In Switch Block; Temperature Switch
1998ToyotaSiennaN/AEngine Mounted; 2 Term.; w/o Trailer Tow Pkg.; Temperature Switch
1997ToyotaAvalonN/AEngine Mounted; Position No. 1 In Switch Block; Temperature Switch
1996ToyotaAvalonN/AEngine Mounted; Position No. 1 In Switch Block; Temperature Switch
1996ToyotaCamry3.0LV6N/AHVAC Blower Motor Resistor Harness with 2 terminals; Temperature Switch
1995ToyotaAvalonN/AEngine Mounted; Position No. 1 In Switch Block; Temperature Switch
1995ToyotaCamry3.0LV6N/AHVAC Blower Motor Resistor Harness with 2 terminals; Temperature Switch

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

111200341550759191448371918814620034207983508468942830130A87983SW1437

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.