on manual reset valves

This sensor is fully compatible with Carrier fan coil controllers and VAV systems

preventing end-user adjustments from disrupting hydronic balance

reducing diagnostic time and installation labor

and industrial ovens requiring a 1/2 inch gas connection

MARS 39042 Limit Switch Els PW 17895 on manual reset valvesThe MARS 39042 is a professional grade Manual Reset Limit Switch designed for high temperature safety across commercial and residential HVACR systems. This SPST (Single Pole Single Throw) switch is engineered to open on temperature rise at a fixed 240F cut out temperature, providing a critical secondary safety layer for furnace plenums and air handling units. Operating within a 120 240V rating and supporting 5 to 10 Amps, it replaces standard 3 4 inch