Lochinvar & A.O. Smith 100109816 Pressure Switch Els PW 17895 Common Questions: What is the

Common Questions: What is the maximum operating temperature for the sensor

it is recommended to inspect and reuse existing silicone tubing or replace it if it shows signs of cracking or heat damage

always use the specific 100109856 part number for compatibility

it replaces previous iterations like the HK42FZ019

Technicians often look for "pitting" on the contacts

Lochinvar & A.O. Smith 100109816 Pressure Switch Els PW 17895 Common Questions: What is theThe 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