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it serves as the primary safeguard against inadequate venting or combustion air blockages
What causes this controller to fail
the high-limit switch had been tripped by excessive heat
the unit features a 300 stainless steel shell and coupling mounting head
Lochinvar & A.O. Smith 100093923 Assembly 320788-702 it serves as the primaryThe Lochinvar & A. O. Smith 100093923 Assembly is a precise MFG40 NAT Manifold Door Assy engineered for natural gas water heaters. As a veteran grade OEM replacement part, this assembly ensures a critical airtight seal for the combustion chamber, maintaining the high efficiency performance required in standard and commercial heating applications. Built to withstand the thermal stress of constant cycling, the manifold door assembly integrates a heavy
