Lochinvar & A.O. Smith 100166057 Pressure Switch 323613-751 it meets rigorous factory specifications

it meets rigorous factory specifications for fit and function

Technicians look for physical signs like a "domed" or bulging top

Always verify temperature rise across the heat exchanger when replacing this limit control

or agricultural dust

Lochinvar & A.O. Smith 100166057 Pressure Switch 323613-751 it meets rigorous factory specificationsAs a seasoned technician, you know that a failing Lochinvar & A. O. Smith 100166057 Pressure Switch is often the silent culprit behind "no ignition" service calls. This OEM replacement air pressure switch is a critical safety component designed to verify proper inducer motor operation and flue venting before allowing the ignition sequence to proceed. Engineered for high recovery commercial water heaters and boilers, it features a precise 0. 95" WC