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Ensure the valve's 11
rust on the furnace deck
though the physical footprint may vary
This heavy-duty steel component is built to withstand the rigors of frequent thermal cycling in residential heating applications
Built with a rugged die-cast aluminum body and a fabric-reinforced rubber diaphragm
Lochinvar & A.O. Smith 100111056 Prover Switch 320788-703 Ensure the valve's 11The Lochinvar & A. O. Smith 100111056 Blower Prover Switch is a critical safety component engineered for precise airflow monitoring in high efficiency commercial gas water heaters. As a direct replacement for the NS2 0544 00 air pressure switch, this assembly ensures the inducer fan effectively clears combustion gases before the ignition sequence initiates. This OEM replacement part is built with a rugged pneumatic diaphragm that converts pressure