Lochinvar & A.O. Smith 100110736 Pressure Switch 340155-7026 and 650122A

and 650122A

This module is the official service replacement for the 64420-002

5/16 inch shaft diameter

Common signs include frost on the evaporator coil

Lochinvar & A.O. Smith 100110736 Pressure Switch 340155-7026 and 650122AThe Lochinvar and A. O. Smith 100110736 Pressure Switch is a critical safety component designed for precise differential pressure monitoring in commercial water heaters and boilers. This blocked outlet switch is calibrated to detect internal venting obstructions, ensuring the combustion blower maintains sufficient airflow before allowing the ignition sequence to proceed. Engineered for high cycle reliability, the 100110736 prevents hazardous operation