Four Seasons 36479 Engine Cooling Fan Switch

Temperature Switch for Radiator-Mounted Cooling Control

Four Seasons 36479 is a radiator mount engine cooling fan switch built for temperature-based fan control. It uses a 2-terminal, white male connector with an open connector shape and an M14 x 1.50 male thread for direct radiator-mounted installation.

Compatible With Mercedes-Benz and Volvo applications that use a radiator-mounted temperature switch, this Four Seasons Temperature Switch line part is built to meet or exceed OEM requirements. The 36479 temperature switch opens at 203 degrees and closes at 212 degrees to help manage electric cooling fan operation at the radiator.

Key Features

• Four Seasons Temperature Switch line
• Part number 36479
• Radiator mount engine cooling fan switch
• M14 x 1.50 male thread
• 2-terminal male connector, white, open shape
• Temperature off at 203 degrees and on at 212 degrees
• Meets or exceeds OEM specifications

Detailed Product Information

This temperature switch is used in radiator-mounted fan control systems where coolant temperature triggers the electric cooling fan. The Four Seasons 36479 is listed for 1989 Mercedes-Benz 560SL, 1987 Mercedes-Benz 300SDL, 1985 Mercedes-Benz 380SL, 1981 Mercedes-Benz 380SL, 1984 Mercedes-Benz 500SEL, and 1981 Mercedes-Benz 380SLC, along with select Volvo 740, 760, 745, DL, and GLE applications that use a radiator-mounted switch. If you are searching for a Mercedes-Benz 560SL temperature switch or a Volvo radiator mounted cooling fan switch, this part number is a direct reference point.

This part cross-references Four Seasons 36479 with aftermarket numbers 1276229 and 1378504 for the same application.

Common Problems This Part Can Address

• Cooling fan not switching on at the correct coolant temperature
• Cooling fan running at the wrong time due to a failed temperature switch
• Intermittent radiator fan operation from worn switch contacts
• Temperature control issues in radiator-mounted fan circuits
• Replacement needs for aging Mercedes-Benz and Volvo cooling systems

Installation Notes and Tips

Verify the radiator mount location, M14 x 1.50 thread size, and 2-terminal connector style before installation. Match the connector gender and shape to the vehicle harness, and confirm the fan switch temperature range aligns with the original application. For best results, inspect the radiator connection point and surrounding wiring for corrosion or damage before installing Four Seasons 36479.

Quality Assurance

Four Seasons lists this temperature switch as meeting or exceeding OEM requirements, supporting proper fit and function in the specified Mercedes-Benz and Volvo applications.