Four Seasons 37820 Engine Cooling Fan Temperature Switch

Temperature Switch for Volkswagen Cooling Systems

Four Seasons 37820 is an engine cooling fan temperature switch built for radiator-mounted temperature control. It uses a rectangular female connector with 3 terminals and meets or exceeds OEM requirements for direct-fit service on supported Volkswagen applications. This Four Seasons Temperature Switch line is focused on accurate cooling-system switching for vehicles that rely on radiator-mounted fan control.

Key Features

• Engine cooling fan temperature switch for radiator mount applications
• Rectangular connector shape with female 3-terminal design
• System mount configuration for temperature-based fan control
• Meets or exceeds OEM specifications
• Direct replacement for Four Seasons 37820

Detailed Product Overview

Four Seasons 37820 is a temperature switch used in the cooling system to trigger fan operation based on radiator temperature. It is listed as a switch-temp/radiator mount unit with a temperature-style, system-mount design. For buyers searching for a Volkswagen Golf temperature switch, Volkswagen Jetta cooling fan switch, or Volkswagen Beetle radiator temperature switch, this part number provides a direct OE-style service option. Cross-reference part numbers include 1H0959481B and SW1429 for the same application.

Compatible With 1993-2001 Volkswagen Jetta, N/A; 1993-1994 Volkswagen Golf, N/A; 1995-2001 Volkswagen Golf, N/A; 1995-1997 Volkswagen Passat, N/A; 1998-2001 Volkswagen Beetle, N/A; and 1998-2002 Volkswagen Cabrio, N/A. The part number 37820 is also commonly searched as Four Seasons 37820 temperature switch for Volkswagen cooling fan control.

Common Symptoms This Part Addresses

• Cooling fan does not switch on at the correct temperature
• Cooling fan runs inconsistently or cycles improperly
• Engine temperature rises during stop-and-go driving
• Radiator fan control signal is lost at the switch
• Temperature-related cooling system warning behavior

Installation Notes and Tips

Verify the connector shape, terminal count, and radiator-mount style before installation. Match the replacement to the vehicle’s original temperature switch configuration and confirm fitment by year, make, and model. On supported Volkswagen Golf, Jetta, Beetle, Passat, and Cabrio applications, the 3-terminal female connector and temperature-switch layout are key identification points.

Quality Assurance

Four Seasons lists this part as meeting or exceeding OEM requirements, supporting OE-style fit and function for cooling-system service.