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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
the pressure relief setting is factory-calibrated to 125 psi
We recommend checking for low-voltage shorts before replacing the transformer to prevent repeat failure
What are the specific port sizes for suction and discharge
ensuring seamless integration with existing control boards
this AOBD model is a side-mount configuration
Lochinvar & A.O. Smith 100109972 Control Box 320788-703 the pressure relief setting isThe Lochinvar & A. O. Smith 100109972 Control Box is a critical replacement component designed for precise sequence control and safety monitoring in high efficiency commercial boilers and water heaters. Engineered to interface seamlessly with the integrated control system, this module manages ignition timing, flame sensing, and temperature modulation. Technicians frequently utilize this OEM replacement part to resolve control board failure symptoms