Lochinvar & A.O. Smith 100111317 Pressure Switch 340155-7024 you should typically see at

you should typically see at least 250-350mV under load at the gas valve terminals to ensure the main burner solenoid stays engaged

the EF23BS121 typically comes as a complete assembly with the 24V coil included for immediate installation

Ensure the physical footprint and the 120V/24V specifications match your original part

Enhanced Airflow Dynamics: Engineered to maintain specific internal geometries required for consistent air volume and static pressure

grounding polarity errors

Lochinvar & A.O. Smith 100111317 Pressure Switch 340155-7024 you should typically see atThe Lochinvar & A. O. Smith 100111317 Pressure Switch is a critical OEM safety component engineered for precise airflow verification in high efficiency water heaters and boilers. This normally open air pressure switch is calibrated to a fixed set point of 0. 20" WC (Water Column), ensuring the combustion blower is generating sufficient negative pressure before the ignition sequence initiates. As a genuine 100111317 replacement part, it provides the