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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
it replaces previous iterations like the HK42FZ019
These are sweat-style connections designed for standard copper refrigerant tubing
Technicians often look for "pitting" on the contacts
always use the specific 100109856 part number for compatibility
Professional installation is required to ensure proper shaft alignment and wiring integration within the furnace's control circuit
Lochinvar & A.O. Smith 100109816 Pressure Switch Els PW 17895 it replaces previous iterations likeThe Lochinvar & A. O. Smith 100109816 Pressure Switch is a critical OEM replacement part engineered for precise atmospheric monitoring in high efficiency commercial water heaters and boilers. Calibrated to a 6. 5" WC (Water Column) set point, this differential pressure switch acts as a safety critical flue prover, ensuring the combustion blower is generating sufficient negative pressure to safely vent exhaust gases. Designed for compatibility with