Lochinvar & A.O. Smith 100109726 Lower Probe 320720-756 used in many 80% and

used in many 80% and 90%+ AFUE 2-stage gas furnaces

The internal spring return mechanism is engineered for fail-safe performance

Improved System Efficiency: Modern spark ignition pilot technology eliminates the gas waste of constant-burn standing pilots

Constant Torque Performance: The X-13 ECM technology provides superior efficiency and consistent airflow compared to legacy induction motors

High Torque Output: Provides 70 lb-in of force to handle medium-sized dampers without stalling

Lochinvar & A.O. Smith 100109726 Lower Probe 320720-756 used in many 80% andThe Lochinvar & A. O. Smith 100109726 Lower Probe is a precision engineered OEM replacement part designed for high efficiency commercial water heaters, specifically the Cyclone Mxi series (BTH 120 300). As a critical water heater temperature sensor, this lower probe assembly provides real time thermal data to the control board, allowing for precise HVAC temperature control and modulation. Operating within the lower tank section, it monitors the