Temperature Switch 195 On / 175 Off

The Temperature Switch 195 On / 175 Off from DeWitts Radiator is an essential engine management component designed for builders and mechanics who demand precision cooling control. This thermal switch activates cooling fans or auxiliary systems at 195°F and disengages at 175°F, maintaining optimal operating temperatures for naturally aspirated and modified engines alike. Whether you're tuning a street rod, muscle car, or performance build, this switch prevents overheating during heavy acceleration and city driving while allowing the engine to reach full operating temperature efficiently.

This temperature switch operates on a simple but effective mechanical principle: a bimetallic element expands and contracts with temperature changes, closing a circuit when coolant reaches 195°F and opening it again at 175°F. This hysteresis design prevents relay chatter and extends component life by reducing on/off cycling. The compact design—measuring just 1.35 x 0.9 x 3.2 inches and weighing only 0.08 lbs—allows installation in tight engine bays without obstruction. DeWitts engineering ensures reliable performance across thousands of thermal cycles, making it ideal for both street and track applications where consistent cooling management is non-negotiable.

Serious automotive enthusiasts, restoration shops, and performance builders rely on this switch to integrate modern cooling logic into classic vehicles and custom engine swaps. Installation is straightforward—mount in a suitable coolant passage or adapter location and wire to your electric fan relay, water pump clutch, or auxiliary cooling system. The 195°F activation threshold suits most street engines running standard thermostats, while the 175°F cutoff prevents overcooling and maintains fuel efficiency. Verify coolant passage compatibility with your specific engine block before ordering.