technicians can quickly swap out the worn seat to ensure the normally open valve meets its original close-off specifications and proportional control requirements

making it suitable for standard residential power configurations

monitoring the heat exchanger temperature and automatically interrupting the burner circuit if internal cabinet temperatures exceed the 285-degree Fahrenheit threshold

technicians often prefer the "HH" core series which includes activated charcoal for wax and varnish removal

Lochinvar & A.O. Smith 100111019 Lower Probe 321894-708 technicians can quickly swap outThe Lochinvar & A. O. Smith 100111019 Lower Probe is a critical OEM replacement temperature sensor designed for commercial high efficiency water heaters. When you are troubleshooting erratic temperature swings or lockout codes on units like the Cyclone BTH, SUF, or HCG series, this immersion style probe is often the primary fix. It provides the central control board with precise thermistor data from the lower section of the tank to manage thermal