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Restricted airflow due to dirty filters or undersized ductwork often leads to excessive heat buildup and eventual coil burnout
Operating at 115V and maintaining a consistent 3000RPM
the HH18HA150 should show continuity (NC position)
ensuring the system operates within its original UL-certified safety parameters
ensuring correct fitment without bracket modification
Lochinvar & A.O. Smith 100111057 Switch Els PW 29614 Restricted airflow due to dirtyThe 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