Four Seasons 35934 Engine Cooling Fan Switch

Temperature Switch for Radiator Mount Cooling Control

Four Seasons 35934 is a radiator-mounted engine cooling fan switch built for temperature-based fan control in select Honda and Acura applications. It uses a brass body, a black open connector, and a 2-terminal male electrical connection for direct replacement service.

With an M16 x 1.50 fitting thread and on/off points of 188°F and 194°F, this Four Seasons Temperature Switch supports accurate fan cycling in vehicles such as the Honda Civic, Honda CRX, Acura Integra, and Acura Legend. Part number 35934 meets or exceeds OEM requirements for the listed applications.

Key Features

• Brand: Four Seasons Temperature Switch
• Part number: 35934
• Radiator mount temperature switch design
• Brass construction for cooling-system service
• Black open connector with male connector gender
• 2-terminal electrical connection
• M16 x 1.50 fitting thread
• Fan open/closed operation with 188°F off and 194°F on settings
• Meets or exceeds OEM specifications

Detailed Product Overview

This engine cooling fan switch is used to trigger radiator fan operation based on coolant temperature. The Four Seasons 35934 is a direct-fit temperature switch for radiator-mounted applications and is listed across multiple Honda and Acura models, including 1973-1987 Honda Civic, 1988-1991 Honda Civic, 1988-1991 Honda CRX, 1986-1991 Acura Integra, and 1986 Acura Legend. It is also listed for 1976-1979 Honda Accord, 1980-1983 Honda Accord, 1979-1981 Honda Prelude, and 1982 Honda Prelude.

This part cross-references Monroe Shocks & Struts 801968 for the same application.

What This Part Helps Address

• Radiator fan not switching on at the correct temperature
• Cooling fan cycling too early or too late
• Temperature switch electrical failure
• Hard starting or overheating concerns tied to fan control issues
• Replacement needs for radiator-mounted fan switch service

Installation Notes and Tips

Verify the radiator mount location, M16 x 1.50 thread size, connector style, and terminal count before installation. Confirm the vehicle’s fan switch temperature range matches the original specification, especially on Honda Civic, Honda CRX, and Acura Integra applications. Clean the mounting surface and inspect the connector for corrosion before reconnecting the harness.

Quality Assurance

Four Seasons 35934 is built to meet or exceed OEM requirements for the listed applications, supporting dependable temperature-based cooling fan operation in service replacement use.