Four Seasons 37827 Engine Cooling Fan Temperature Switch

Four Seasons 37827 Temperature Switch

Four Seasons 37827 is an engine cooling fan temperature switch for radiator-mounted applications. It uses a 2-terminal male oval connector and a system-mount temperature design to help control fan operation based on coolant temperature.

Key Features

• Engine cooling fan temperature switch for radiator mount use
• Oval connector shape with 2 terminals and male connector gender
• Temperature-style switch with system mount location
• Meets or exceeds OEM requirements
• Four Seasons Temperature Switch line for direct replacement applications

Product Details

This Four Seasons Temperature Switch line part, part number 37827, is built for temperature-based fan control in cooling systems that use a radiator-mounted switch. It is listed as a temperature switch with a switch-temp/radiator mount description, making it a direct-fit service part for vehicles that rely on coolant temperature input to trigger fan operation. This part cross-references A14177 and SW2400 for the same application. It fits 2001-2005 Lexus IS300, N/A; 2000-2005 Toyota Echo, N/A; and 2001-2005 Toyota RAV4, N/A. Common search terms include Toyota RAV4 temperature switch replacement, Lexus IS300 radiator fan temperature switch, and Toyota Echo engine cooling fan switch 37827.

Common Issues This Part Can Address

• Cooling fan not switching on at the proper temperature
• Cooling fan running at the wrong time due to a failed temperature signal
• Overheating caused by inconsistent fan control
• Intermittent radiator fan operation from a worn switch
• Temperature-related drivability concerns tied to cooling system control

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This part uses an oval, 2-terminal male connector and a system-mount configuration, so matching the original switch design is important for proper fitment. Confirm vehicle application by year and model before ordering, especially for 2001-2005 Lexus IS300, 2000-2005 Toyota Echo, and 2001-2005 Toyota RAV4. Part number 37827 should be matched to the original unit when replacing a radiator-mounted temperature switch.

Quality Assurance

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