HomeBelts and Cooling > SwitchesFour Seasons 20001 Engine Cooling Fan Switch
Part #: 20001

Four Seasons 20001 Engine Cooling Fan Switch

Temperature Switch
⚙️ 34 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$28.75Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Temperature Switch
🚗Fitment: Acura, NSX, RL, and Legend
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Engine Cooling Fan Switch for Acura Vehicles

The Four Seasons Temperature Switch 20001 is designed to maintain optimal engine temperature by controlling the cooling fan operation. Specifically engineered for Acura Legend, NSX, and RL models, this engine cooling fan switch ensures precise temperature regulation to protect your vehicle's engine.

  • Compatible with Acura Legend, NSX, and RL models
  • Temperature activation range: turns on at 197°F and off at 188°F
  • Durable M16 x 1.50 male fitting thread for secure radiator mounting
  • Equipped with a 2-terminal female connector available in black/yellow or white
  • Weather Pack sealed connector for reliable performance in harsh conditions
  • Meets or exceeds OEM specifications for dependable operation

About the Four Seasons Temperature Switch Product Line

The Four Seasons Temperature Switch line focuses on precision temperature control components for engine cooling systems. This product line includes switches designed to activate and deactivate cooling fans based on specific temperature thresholds, helping maintain engine efficiency and prevent overheating. The 20001 switch is part of this line, offering reliable radiator mount installation and compatibility with select Acura models.

Detailed Product Description

The Four Seasons Temperature Switch 20001 is a temperature-activated switch mounted directly on the radiator system. It features a male fitting with an M16 x 1.50 thread size, ensuring a secure and proper fit. The switch operates by turning the cooling fan on at 197°F and off at 188°F, maintaining the engine within optimal temperature limits. It includes a 2-terminal female connector, available in black/yellow or white, with Weather Pack sealing to protect against moisture and contaminants. This switch is engineered to meet or exceed original equipment manufacturer (OEM) standards, providing reliable and consistent performance in Acura Legend, NSX, and RL vehicles.

Common Applications and Issues Addressed

  • Prevents engine overheating by activating cooling fans at the correct temperature
  • Resolves intermittent cooling fan operation issues
  • Replaces faulty or worn temperature switches causing engine temperature fluctuations
  • Ensures proper radiator fan cycling to improve engine efficiency
  • Maintains system mount integrity with precise fitting thread size

Installation Notes and Tips

When installing the Four Seasons Temperature Switch 20001, ensure the radiator mount location is clean and free of debris. Use the M16 x 1.50 male fitting thread to securely fasten the switch. Confirm the connector gender matches your vehicle’s wiring harness—this switch uses a female connector with two terminals. Verify the connector color (black/yellow or white) for compatibility. Proper installation will ensure accurate temperature sensing and reliable fan control.

Quality Assurance and Warranty

This Four Seasons Temperature Switch meets or exceeds OEM specifications, ensuring dependable performance and durability. The product includes a Weather Pack sealed connector to withstand environmental exposure. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.

BrandFour Seasons
Part Number20001
PositionTemperature Switch
Connector ColorBlack / Yellow
Connector ColorWhite
Connector GenderFemale
DescriptionSwitch-Temp /Radiator Mount
Fitting GenderMale
Fitting ThreadM16 x 1.50
Fitting Thread SizeM16-1.50
Functiontemperature switch
Meets / Exceeds OEM?YES
Mnt Sys LocSystem Mount
StyleTemperature
Temperature Off188
Temperature On197
Terminal Pin Qty.2
Terminal Quantity2
TypeTemperature
Weather Pack?Yes

This part fits 34 vehicles. Search below:

YearMakeModelPositionNotes
2005AcuraNSXN/ATemperature Switch
2004AcuraNSXN/ATemperature Switch
2004AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2003AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2003AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2002AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2002AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2001AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2001AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2000AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
2000AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1999AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1999AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1998AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1998AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1997AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1997AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1996AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1996AcuraRLN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1995AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1995AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1994AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1994AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1993AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1993AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1992AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1992AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1991AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1991AcuraNSXN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1990AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1989AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1988AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1987AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; Temperature Switch
1986AcuraLegendN/ARadiator Mounted Engine Cooling Fan Switch; 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:

111200011550747171169519144504191881292000120795121180821280837760PH700350356A87951AC8817HS808SW576

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