Lochinvar & A.O. Smith 100111057 Switch Els PW 29614 ensuring the system operates within

ensuring the system operates within its original UL-certified safety parameters

the HH18HA150 should show continuity (NC position)

featuring improved material resilience while maintaining the same HVAC part compatibility footprint

As a direct Johnson Controls replacement part

Lochinvar & A.O. Smith 100111057 Switch Els PW 29614 ensuring the system operates withinThe Lochinvar & A. O. Smith 100111057 Blocked Inlet Switch is a critical safety component designed for high efficiency commercial water heaters and boilers, including the Cyclone Xi BTH and Shield series. This normally closed (NC) pressure switch monitors the combustion air intake, ensuring the blower assembly receives adequate airflow for safe operation. Engineered with a dedicated 0. 85" W. C. trip point, it immediately breaks the safety circuit if