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In consistent Knight XL or Cyclone models
the fan motor not running during the defrost cycle
meaning it will actuate and hold position even at 0 PSI
Standard field procedure requires replacing the filter drier whenever the sealed system is breached for repairs
Durable Forged Brass Construction: Rated for a maximum pressure of 300 psig (working) and 400 psig (static)
Utica-Dunkirk 550001524 Control Board 318973-401 In consistent Knight XL orThe Utica Dunkirk 550001524 Control Board is a critical OEM replacement component designed to manage sequences for residential and light commercial hydronic systems. As a veteran technician knows, this integrated boiler control orchestrates essential operations, including ignition timing, flame sensing, and blower motor modulation, ensuring the appliance meets precise thermal demands. Built to handle the rigorous duty cycles of Utica and Dunkirk gas
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