Reliable Switching: Built to manage the arcing and heat generation typical of high-current switching in HVAC applications

Whether used for steam boiler safety or potable water level management

including gas-fired wall heaters and millivolt floor furnaces

Easy Installation: Includes 6-foot pigtail leads and a strap-on design that eliminates the need for thermal wells or system shutdowns

and WeatherKing condensing units

Trane CNT1662 High Limit Reliable Switching: Built to manageThe Trane CNT1662 High Limit is a critical safety component designed for precise thermal regulation within furnace and air handler heat exchangers. Built with an L250F SPST NC C High limit configuration, this switch acts as a failsafe by monitoring supply plenum temperatures and interrupting the 24V control circuit if levels exceed the 250F threshold. This immediate shutdown of the gas valve helps prevent structural damage to the primary heat