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What are the default start and end settings
we recommend installation by a licensed HVAC professional to ensure all safety parameters and wiring connections meet local codes
What is the maximum operating pressure differential (MOPD)
the reversing valve shifts
though technicians should always inspect the fan shaft for scoring or damage that might require additional parts
Lochinvar & A.O. Smith 100109976 Control Board 340155-7026 What are the default startThe Lochinvar & A. O. Smith 100109976 Control Board is a critical integrated electronic control module designed for high efficiency boilers and commercial water heaters. This OEM replacement part acts as the central microprocessor, managing ignition sequences, flame proving, and safety limit monitoring. It is a direct successor to the AO Smith 9004600205, ensuring backward compatibility with legacy systems. The addition of the cable assembly harness
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