Four Seasons 20036 Engine Cooling Fan Switch

Temperature Switch for Radiator Fan Control

Four Seasons Temperature Switch 20036 is a radiator-mounted engine cooling fan switch built with a brass body, white rectangular male connector, and 3 terminals. It uses an M22 x 1.50 fitting thread and is specified for open fan operation with on/off temperature points of 197/206 and 179/188.

Compatible With Audi A8 Quattro, Audi A8, Volkswagen EuroVan, and Volkswagen Vanagon applications that use this radiator-mounted temperature switch configuration. Four Seasons 20036 meets or exceeds OEM requirements and is a direct-fit temperature switch for the listed vehicles.

Key Features

• Brand: Four Seasons Temperature Switch line
• Part number: 20036
• Radiator-mounted engine cooling fan switch
• Brass construction for the switch body
• White rectangular male connector
• 3-terminal design
• M22 x 1.50 fitting thread
• Open fan operation
• Temperature off: 179/188
• Temperature on: 197/206
• Meets or exceeds OEM specifications

Product Details

This Four Seasons temperature switch is used to monitor coolant temperature at the radiator and trigger fan operation at the specified thresholds. The 20036 part number is listed for 1997-2001 Audi A8 Quattro, 1998-1999 Audi A8, 1992-1993 Volkswagen EuroVan, and 1986-1991 Volkswagen Vanagon. If you are replacing a radiator mounted engine cooling fan switch on one of these vehicles, Four Seasons 20036 provides the correct thread size, connector style, and terminal layout for the application.

This part cross-references 025906041 and SW650 for the same application.

Common Problems This Part Can Address

• Cooling fan not switching on at the proper coolant temperature
• Cooling fan staying on longer than expected after warm-up
• Intermittent radiator fan operation caused by a worn temperature switch
• Incorrect fan cycling on Audi A8 Quattro and Audi A8 models
• Faulty radiator-mounted switch readings on Volkswagen EuroVan and Vanagon vehicles

Installation Notes and Tips

Verify the connector shape, terminal count, and M22 x 1.50 thread before installation. Confirm the radiator-mounted switch location and compare the temperature on/off values to the original part. Clean the mounting area and inspect the connector for corrosion or heat damage before reconnecting the harness.

Quality Assurance

Four Seasons lists this temperature switch as meeting or exceeding OEM requirements, making it a direct replacement option for the specified cooling fan control applications.