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This hard start assembly is specifically engineered for single-phase
the internal diaphragm or contact is likely defective
Check the data plate on your unit or the existing switch
Contractors should verify the part number against the unit's bill of materials or technical guide to ensure the pin configuration matches the installed SEC board
this is a drop-in OEM ClimateMaster part that eliminates the mounting headaches and performance drops associated with "universal" alternatives
Beckett Igniter 5912U Head Assembly 321702-401 This hard start assembly isWhen you're out in the field servicing an oil fired system, the Beckett Igniter 5912U Head Assembly is the heavy duty solution you need for consistent ignition. This L1 combustion head is a critical OEM replacement part designed specifically for the Beckett AFG series burners found in residential and industrial furnaces and boilers. As a Beckett burner head assembly, it ensures the precise delivery of a high voltage spark to the oil spray,