Four Seasons 37435 Engine Cooling Fan Temperature Switch

Four Seasons 37435 Temperature Switch

The Four Seasons 37435 engine cooling fan temperature switch helps control fan operation based on coolant temperature. It is an OE-style temperature switch for engine or radiator mounting and is listed for 1985-1989 Nissan 300ZX applications.

Key Features

• Engine cooling fan temperature switch for thermal fan control
• Temperature on at 208 and temperature off at 197
• 2-terminal design with female connector
• Engine/radiator mounted style
• Meets or exceeds OEM requirements
• Four Seasons Temperature Switch product line

Product Details

Four Seasons 37435 is a temperature-style cooling fan switch used to trigger fan operation when coolant temperature reaches the specified threshold and shut it back off as temperatures drop. This part number is a direct fit for 1985-1989 Nissan 300ZX models and is built for engine cooling systems that rely on a temperature switch mounted at the engine or radiator. If you are searching for a Nissan 300ZX cooling fan temperature switch, Four Seasons 37435 is the cataloged replacement.

This part cross-references A03835 and SW1645 for the same application.

What It Helps Address

• Cooling fan not switching on at the correct temperature
• Cooling fan staying on longer than expected
• Erratic fan cycling caused by a worn temperature switch
• Overheating concerns tied to fan control faults
• Loss of proper thermal control in Nissan 300ZX cooling systems

Installation Notes and Tips

Verify the connector style, terminal count, and mounting location before installation. Confirm the temperature on and temperature off points match the vehicle’s cooling system requirements. For 1985-1989 Nissan 300ZX temperature switch replacement, compare the original switch and connector orientation to ensure proper fitment.

Quality Assurance

Four Seasons lists this part as meeting or exceeding OEM requirements, supporting consistent replacement quality for the 37435 temperature switch application.