Automatic Reset: Eliminates manual intervention by restoring the circuit once temperatures return to safe operating parameters

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

and WeatherKing condensing units

You must identify the root cause—such as low refrigerant flow

Trane CNT1662 High Limit Automatic Reset: Eliminates manual interventionThe 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