Four Seasons 35931 Engine Cooling Fan Switch

Reliable Engine Cooling Fan Switch for Ford and Mercury Vehicles

The Four Seasons Temperature Switch 35931 is engineered to maintain optimal engine temperature by controlling the cooling fan operation. Designed specifically for select Ford and Mercury models, this engine cooling fan switch ensures precise temperature regulation and reliable performance.

• Compatible with Ford and Mercury models including Capri, Cougar, Escort, Fairmont, LN7, LTD, Lynx, Marquis, Mustang, Thunderbird, and Zephyr
• Engine mounted temperature switch with a 3/8" pipe fitting thread size (43/64" x 18)
• Operates between 220°F (off) and 228°F (on) for accurate fan control
• Single terminal, male connector with an open connector shape
• Meets or exceeds OEM specifications for dependable fit and function

About the Four Seasons Temperature Switch Product Line

The Temperature Switch line by Four Seasons focuses on precision-engineered components designed to regulate engine cooling fan operation based on temperature thresholds. The 35931 switch is part of this line, providing reliable temperature sensing and fan activation to help maintain engine performance and prevent overheating in compatible Ford and Mercury vehicles.

Detailed Product Description

This engine cooling fan switch features a male fitting with a 3/8" pipe thread size, designed for direct engine mounting. The switch activates the cooling fan at 228°F and turns it off at 220°F, ensuring the engine remains within optimal temperature ranges. The single terminal male connector with an open shape allows for straightforward electrical connection. This part is engineered to meet or exceed original equipment manufacturer (OEM) standards, providing a precise fit and reliable operation for models such as the Ford Mustang, Mercury Cougar, and others listed in the fitment.

Common Applications and Issues Addressed

• Prevents engine overheating by activating the cooling fan at the correct temperature
• Resolves intermittent or non-functioning cooling fan problems
• Replaces faulty or worn temperature switches causing erratic fan operation
• Ensures proper engine temperature regulation for improved performance
• Helps maintain cooling system efficiency in Ford and Mercury vehicles

Installation Notes and Tips

• Ensure the engine is cool before installation to avoid injury
• Locate the engine-mounted switch fitting and disconnect the electrical connector
• Remove the old switch by unscrewing the 3/8" pipe thread fitting
• Install the Four Seasons Temperature Switch 35931 by threading it securely into place
• Reconnect the male terminal connector and verify proper fan operation

Quality Assurance and Warranty

The Four Seasons Temperature Switch 35931 is manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. This part undergoes rigorous quality control testing to maintain consistent standards. Please refer to Four Seasons' warranty policy for specific coverage details.