Lochinvar & A.O. Smith 100111032 Pressure Switch 320819-301 these cores are fully interchangeable

these cores are fully interchangeable with competitive shells

An open circuit or a reading significantly outside the 40-75 ohm range generally indicates a dead element

the terminal block layout is engineered for standard field wiring

verify gas pressure at the valve

Lochinvar & A.O. Smith 100111032 Pressure Switch 320819-301 these cores are fully interchangeableThe Lochinvar & A. O. Smith 100111032 Pressure Switch is a critical safety component designed for LP Liquid Propane applications in high efficiency commercial water heaters and boilers. As a Low Gas Pressure Switch, its primary function is to monitor the incoming fuel supply and interrupt the burner circuit if the pressure drops below the calibrated set point. This proactive safety measure prevents incomplete combustion, carbon monoxide buildup, and