Standard Motor Products TS-666 Coolant Fan Switch

The Standard Motor Products TS-666 is a direct-fit replacement coolant fan switch engineered to restore proper electric cooling fan operation. This switch monitors coolant temperature and signals the cooling fan to activate or deactivate, maintaining the engine within its optimal operating temperature range and preventing overheating.

Standard Motor Products manufactures the TS-666 to meet or exceed original equipment (OE) specifications, ensuring the switch actuates at the correct temperature threshold — just like the factory part it replaces. Built from high-grade materials including a metal housing and high-temperature wire insulation, this switch is designed for long-lasting, reliable performance under the demanding conditions of modern engine bays.

Key Features:

• Direct-fit OE replacement — matches exact resistance and temperature ratings of the original switch
• Engineered to carry high electric current for reliable fan control signals
• Metal housing and high-temperature wire covers for durability and longevity
• Factory-calibrated to switch at the specified temperature set point
• Meets or exceeds OEM specifications for proper fit, form, and function
• Sold as a single unit

The Standard Motor Products TS-666 is a trusted solution for restoring cooling fan function and protecting your engine from heat-related damage. Standard Motor Products (SMP) is a leading independent supplier to the automotive aftermarket with a long-standing reputation for quality and integrity.