Four Seasons 36484 Engine Cooling Fan Switch

Temperature Switch for BMW Cooling Control

Four Seasons Temperature Switch 36484 is a radiator-mounted engine cooling fan switch built for direct temperature-based fan control. It uses a white rectangular female connector with 3 terminals and an M14 x 1.50 male thread for radiator mounting.

Compatible With BMW 528i, 540i, 740i, 740iL, and 750iL applications, this Four Seasons Temperature Switch 36484 meets or exceeds OEM requirements and switches the fan at 195/220 degrees for radiator-mounted cooling systems.

Key Features

• Brand: Four Seasons Temperature Switch line
• Part number: 36484
• Radiator mount temperature switch for engine cooling fan control
• White rectangular female connector
• 3-terminal electrical connection
• M14 x 1.50 male thread
• Fan open/closed operation
• Temperature on points: 195 / 220
• Meets or exceeds OEM specifications

Product Details

This temperature switch is used in radiator-mounted cooling fan circuits to monitor coolant temperature and trigger fan operation at the specified temperature points. The Four Seasons Temperature Switch 36484 is a direct-fit style replacement for BMW cooling systems that rely on a threaded radiator-mounted switch with a 3-pin connector. It is a practical choice for BMW 528i, BMW 540i, BMW 740i, BMW 740iL, and BMW 750iL models listed in the fitment data.

This part cross-references Dynomax 36484 for the same application.

What It Helps Address

• Cooling fan not switching on at the correct temperature
• Cooling fan staying on longer than expected
• Intermittent radiator fan operation caused by a failing temperature switch
• Temperature-related engine cooling control issues
• Faulty radiator-mounted switch signal in BMW cooling systems

Installation Notes and Tips

Install at the radiator mount location using the M14 x 1.50 threaded fitting and verify the connector style before installation. Confirm the vehicle uses a 3-terminal, white rectangular female connector and match the temperature switch function to the original part. Always compare the existing switch, thread size, and connector layout against the vehicle before service.

Quality Assurance

Four Seasons lists this temperature switch as meeting or exceeding OEM requirements, making it a specification-based replacement for radiator-mounted cooling fan control.