this motor ensures the safe evacuation of flue gases from the heat exchanger

Dead-End Lock-Up: Provides a bubble-tight shut-off to protect downstream components from over-pressurization

this 5300 series thermostat operates with a DPST (Double Pole Single Throw) configuration

the contacts will automatically re-close to resume normal operation

Lochinvar & A.O. Smith 100109916 Limit Control 318172-701 this motor ensures the safeThe Lochinvar & A. O. Smith 100109916 Dual Limit Control is a critical safety component designed for heavy duty commercial and residential heating systems. This OEM water heater part serves as a high precision manual reset limit switch, engineered to prevent hazardous overheating by interrupting the burner circuit when temperatures exceed the safe operational threshold. As a direct 100109916 replacement for legacy models 11B79 3, 9004529005, and