Lochinvar & A.O. Smith 100109825 Thermostat 322057-301 The standard Trerice 3-4F2 is

The standard Trerice 3-4F2 is designed for industrial HVAC systems

and HS26-042-03 series units

There should be zero resistance when closed and infinite resistance ("OL") when the plunger is released

supporting capacities up to 247

ensuring that the pressure switch closes reliably to prevent lockout codes

Lochinvar & A.O. Smith 100109825 Thermostat 322057-301 The standard Trerice 3-4F2 isThe Lochinvar & A. O. Smith 100109825 Thermostat is a critical OEM replacement part designed for high performance residential water heaters and select commercial boiler applications. Engineered for precision thermal regulation, this Lower Residential TOD (Therm O Disc) thermostat ensures accurate temperature sensing and high limit protection within the gas train assembly or electric heating circuit. As a veteran grade HVAC replacement control, it