Lochinvar & A.O. Smith 100173793 Arm Assembly 340155-7026 What causes this high-limit switch

What causes this high-limit switch to trip frequently

and the fingertip dial adjustment cap allows for quick temperature calibration between 120°F and 160°F

Constructed with an extruded aluminum frame and blades

the bronze construction and EPDM seating are compatible with standard water and glycol heating media up to the 250°F threshold

Broad Pressure Range: Adjustable opening point from 70 to 260 PSI accommodates various high-pressure refrigerant requirements

Lochinvar & A.O. Smith 100173793 Arm Assembly 340155-7026 What causes this high-limit switchThe Lochinvar & A. O. Smith 100173793 Arm Assembly is a critical OEM replacement part engineered for high efficiency commercial boilers and heating systems. As a veteran grade gas air arm assembly, this component ensures the precise mechanical alignment necessary for optimal combustion and fluid regulation. Specifically designed for compatibility with Lochinvar Knight series models (including KBN, AWN, and SNA 500), this assembly facilitates the