Lochinvar & A.O. Smith 100208561 Flue Sensor 321042-401 Featuring a 30 cubic inch

Featuring a 30 cubic inch desiccant core

System Feedback: Integrated auxiliary end switches allow for proving damper position or interlock with fans and air cleaners

preventing valve chatter and ensuring responsive performance under high-duty cycles

This specific model is a direct OEM replacement for legacy part numbers

Lochinvar & A.O. Smith 100208561 Flue Sensor 321042-401 Featuring a 30 cubic inchThe Lochinvar & A. O. Smith 100208561 Flue Sensor is a critical high temperature monitoring component engineered for precision in FTXL FTX 400 850(N L) heating boilers and Aquas AP400 850 commercial pool package heaters. As a direct replacement for TST20026K and 100170554, this updated flue temperature sensor provides real time thermal feedback to the control board to verify safe combustion levels and prevent exhaust system overheating. For a