using an OEM replacement seal like the 30067531-891 ensures chemical compatibility with standard lubricants and pneumatic air supplies

Check the unit's nameplate for a date code subsequent to 9923

Automated Reset Logic: Features an integrated auto-reset function

you must physically depress the reset button on the back of the switch after resolving the airflow issue

The Watts 0881427 (GB-C) is a professional-grade high-temperature gasket kit engineered for 1-inch dielectric unions

Lochinvar & A.O. Smith 100208552 Temp Sensor using an OEM replacement sealThe Lochinvar & A. O. Smith 100208552 Water Temperature Sensor is a critical NTC thermistor designed for high accuracy thermal monitoring in commercial and residential hydronic systems. This OEM replacement part, also identified by cross reference numbers TST2032, TST2032K, and 100274731, provides the precise resistance to temperature feedback required by the system's control board to manage firing rates and maintain setpoint stability. Featuring an