Four Seasons 20001 Engine Cooling Fan Switch

Four Seasons Temperature Switch 20001

The Four Seasons Temperature Switch 20001 is a radiator-mounted engine cooling fan switch built for direct temperature control in the cooling system. It uses a 2-terminal, female connector design with a black/yellow and white connector color layout, and it meets or exceeds OEM requirements for the listed applications.

Key Features

• Engine cooling fan switch for radiator mount applications
• M16 x 1.50 male thread for the fitting connection
• 2-terminal, female connector design
• Temperature on at 197 and off at 188
• Weather Pack sealed connection
• Meets or exceeds OEM specifications
• Four Seasons Temperature Switch line for temperature-controlled cooling system operation

Product Details

Four Seasons 20001 is a temperature switch used in radiator-mounted cooling fan circuits to help control fan engagement based on coolant temperature. The switch is specified with an M16 x 1.50 thread, a male fitting, and a 2-pin electrical interface, making it a practical OE-style replacement for vehicles that use this style of radiator-mounted temperature switch. This part cross-references AP Exhaust 20001 and Walker Exhaust 50356 for the same application.

Compatible With Acura NSX, Acura RL, and Acura Legend applications, this switch supports temperature-based fan operation in vehicles such as the 2004-2005 Acura NSX, 1996-2004 Acura RL, 1991-2003 Acura NSX, and 1986-1995 Acura Legend. The Four Seasons 20001 is also a relevant search match for drivers looking for an Acura NSX radiator mounted engine cooling fan switch or Acura RL temperature switch replacement.

What It Helps Address

• Cooling fan not switching on at the correct temperature
• Cooling fan staying on longer than expected
• Faulty radiator-mounted temperature switch operation
• Temperature-related fan control issues in the cooling system
• Need for an OE-style replacement temperature switch

Installation Notes

Install in the radiator-mounted system location specified by the vehicle application. Verify the thread size, connector style, and temperature range before installation to confirm the replacement matches the original switch. Because this part uses a Weather Pack connection and a 2-terminal layout, connector fitment should be checked against the existing harness before service.

Quality Assurance

Four Seasons lists this temperature switch as meeting or exceeding OEM requirements for the applications shown, supporting a direct-replacement approach for cooling system service.