Four Seasons 20004 Engine Cooling Fan Switch

Engine Cooling Fan Switch for Audi Applications

Four Seasons Temperature Switch 20004 is an engine-mounted cooling fan switch built for temperature-based fan control. It uses a white male connector with 2 terminals and an M10 x 1.00 thread for direct replacement service on select Audi models.

Compatible with Audi 100, Audi 80, Audi 90, Audi 200, and Quattro applications from 1988-1992, this Four Seasons 20004 temperature switch is specified to turn the fan circuit off at 185 and on at 230. It meets or exceeds OEM requirements and cross-references Baldwin 20004 for the same application.

Key Features

• Four Seasons Temperature Switch, part number 20004
• Engine-mounted cooling fan switch
• White connector color with open connector shape
• 2-terminal male connector
• M10 x 1.00 fitting thread size
• Temperature off at 185 and on at 230
• Meets or exceeds OEM specifications

Product Details

The Four Seasons Temperature Switch line focuses on temperature-actuated engine cooling control. This 20004 switch is designed for engine-mounted fan operation and uses a temperature-based on/off strategy to help regulate cooling system response. It is a direct-fit style replacement for select Audi vehicles, including 1990-1992 Audi 100 and 100 Quattro, 1990-1992 Audi 80 and 80 Quattro, 1990-1991 Audi 90 and 90 Quattro, 1989 Audi 200 and 200 Quattro, and 1988 Audi 5000 Quattro.

This part number 20004 is also listed under interchange references including Eastern Catalytic 50357. Use the vehicle fitment details to confirm the exact application before ordering.

Common Cooling System Issues It Can Address

• Cooling fan not switching on at the correct temperature
• Cooling fan staying on longer than expected
• Intermittent fan operation caused by a worn temperature switch
• Engine temperature control concerns tied to switch failure
• Fault codes or drivability complaints related to fan circuit operation

Installation Notes and Tips

Install this switch on the engine-mounted location specified by the vehicle application. Verify the connector style, terminal count, and M10 x 1.00 thread size before installation. Confirm the cooling system is properly serviced and the engine is at the correct temperature range when testing fan operation after replacement.

Quality Assurance

Four Seasons lists this temperature switch as meeting or exceeding OEM requirements for the specified applications. The 20004 part number is built for direct replacement use on the listed Audi fitments, including Audi 100, Audi 80, Audi 90, and related Quattro models.