Radiator Thermal Switch Temperature Sensor A reliable thermal switch designed to monitor coolant temperature and control radiator fan operation. This sensor helps prevent engine overheating, reduces unnecessary fan run time, and supports consistent cooling system performance. It is a straightforward solution for vehicles and equipment that use a temperatureactuated switch to operate electric cooling fans. Key benefits Prevents overheating: Activates the cooling fan when coolant reaches the switch set point, protecting the engine and associated components. Improves efficiency: Turns the fan off when cooler temperatures are reached, reducing electrical load and improving fuel economy. Simple replacement: Compact, threaded design and twoconnector wiring make installation quick for service and . Durable operation: Built for continuous cycling and exposure to coolant system conditions to provide dependable performance over time. What it does (functionality) Detects coolant temperature via a temperaturesensitive element and closes or opens the switch contacts at the specified activation temperature. Provides an on/off signal to the radiator fan relay or directly to the fan motor where applicable. Acts as a failsafe element in cooling system control, engaging the fan only when needed. Key attributes Application: For cooling systems that use a thermal switch to control electric fans in automotive, lighttruck, motorcycle, or smallengine applications. Installation: Threaded sensor body for panel or housing mounting; electrical connector(s) for straightforward wiring to existing fan circuits or relays. Construction: Corrosionresistant materials and sealed electrical connections for reliable service in coolantexposed environments. Performance: Fast thermal response and stable switching action to ensure fans operate at the intended temperatures. Size and fit: Compact profile to fit into radiator housings or engine coolant passages where a thermal switch is required. Confirm thread size and mounting dimensions against the vehicle's original part before . Use cases / applications Replacement part for a failed radiator fan switch: Swap the sensor to restore automatic fan operation and eliminate overheating risks. Cooling system upgrade or maintenance: Install during cooling system refresh or when converting to an electric fan setup that requires a temperatureactivated switch. Equipment and smallengine cooling control: Use in generators, construction equipment, or agricultural machinery that depend on a thermal switch to manage fan engagement. Installation and maintenance notes Verify the correct thread size, orientation, and electrical connector type for your vehicle or equipment before installation. Tighten to the manufacturer's recommended torque; avoid overtightening to prevent housing damage. Inspect wiring and connectors for corrosion and secure routing away from heat sources and moving parts. Test switch operation by monitoring fan engagement at operating temperature or using a multimeter to check continuity change at the specified activation range. Compatibility and verification Designed to function in systems that use a thermal switch for fan control. Confirm compatibility with your vehicle's original equipment specifications, thread size, and switching temperature before ordering to ensure proper fit and operation. Reliable temperature sensing and switching helps keep your cooling system working as intended. Use this radiator thermal switch temperature sensor as a practical replacement or service part where a temperatureactivated fan control switch is required.