Lochinvar & A.O. Smith 100111940 Display 321702-401 000 BTUH capacity successor to

000 BTUH capacity successor to several legacy Honeywell and Lennox models

Using a wet rag or heat-sink paste on the valve body is mandatory to protect internal seals

allowing for rapid identification of pressure switch trips or flame sensing issues

it provides the versatile airflow control necessary to maintain precise static pressure and CFM requirements across various heating and cooling stages

The steel wheel construction is designed for standard HVAC operating temperatures and provides better structural integrity than plastic or thin-gauge aluminum wheels in light industrial use

Lochinvar & A.O. Smith 100111940 Display 321702-401 000 BTUH capacity successor toThe Lochinvar & A. O. Smith 100111940 User Interface Display is a critical OEM replacement part engineered for high efficiency commercial boilers and volume water heaters. This Smart System control interface serves as the primary communication hub between the technician and the internal logic board, allowing for precise parameter adjustment and real time diagnostic monitoring. Built to withstand the rigorous demands of mechanical rooms, this display