Common Questions: Which steam trap models use the A21348-1 gasket

the S1-026-19654-012 is the correct OEM replacement

intermittent pressure switch trip errors

Robust 24VAC circuitry stabilizes flame rectification signals to minimize lockout callbacks

preventing the hazardous accumulation of unburned gas by signaling the integrated control board to maintain the gas valve circuit only when a stable flame is present

Lochinvar & A.O. Smith 100170647 Sensor Kit 321142-301 Common Questions: Which steam trapThe Lochinvar & A. O. Smith 100170647 Sensor Kit is a critical OEM replacement part designed for precise monitoring of flue temperature in high efficiency boilers and water heaters. As a veteran technician knows, managing exhaust thermal data is non negotiable for system safety and operational integrity. This flue sensor kit serves as a primary safeguard, transmitting real time temperature fluctuations to the control board. If exhaust gases exceed