Standard Motor Products TS459 Engine Coolant Fan Switch

The Standard Motor Products TS459 is a direct-fit replacement engine coolant fan switch (also known as a radiator fan switch or coolant temperature fan switch) engineered to restore proper cooling fan operation and protect your engine from overheating.

This thermal switch monitors coolant temperature and sends an electrical signal to the fan controller, activating the electric cooling fan at the precise temperature threshold required by your vehicle's cooling system. Built to OE specifications, it delivers the same fit, form, and function as the original factory component.

Key Features:

• Bimetallic Contact Design: Uses a formed bimetallic contact arm that responds to the different expansion rates of two fused metals, providing smooth, creep-action switching for precise temperature control
• Custom Wax Pellet Technology: Internally formulated wax pellets expand when heated to activate a snap-action electrical contact, reliably transferring the signal to the fan controller at the correct temperature
• Factory Calibrated: Every unit is calibrated and tested at the factory to confirm switch actuation at the specified temperature set point before leaving the production line
• OE-Level Quality: Manufactured to meet or exceed original equipment specifications for proper fit and reliable performance
• Complete Quality Control: Standard Motor Products maintains in-house quality control from raw componentry through the finished product

A faulty coolant fan switch can result in the electric cooling fan failing to activate, leading to engine overheating and potential damage. The Standard Motor Products TS459 is a dependable, professional-grade replacement that restores your cooling system to factory performance standards.