Lochinvar & A.O. Smith 100208561 Flue Sensor L99H008 Use a non-spring return or

Use a non-spring return or spring-return linkage depending on your fail-safe requirements

providing sufficient relief for medium-to-large scale boiler applications

ensuring seamless compatibility and restoring factory-spec performance for demanding contractors and service technicians

maintaining system integrity without requiring extensive recalibration

and a complete set of NBR (Buna-N) gaskets and seals to eliminate internal bypass and external leakage

Lochinvar & A.O. Smith 100208561 Flue Sensor L99H008 Use a non-spring return orThe 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