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The Weil McLain 511-330-221 is a Natural Gas Pilot Burner Assembly designed specifically for heavy-duty commercial and residential atmospheric boilers
preventing stagnation and rust on internal metal components
The integrated 10 ft plenum-rated cable simplifies installation
Equipped with a 1/2" NPT lower connection and a 2-inch probe length
York S1-331-09150-001 Control Board R-410A The Weil McLain 511-330-221 isThe York S1 331 09150 001 Control Board is a critical OEM replacement part engineered for two stage furnace systems and residential air conditioning units. As a veteran grade HVAC ignition control, this Simplicity Lite control board manages the complex timing of the gas valve, flame sensor, and blower motor, ensuring precise 2 stage heating and cooling cycles. Field technicians typically utilize this board to resolve issues with intermittent ignition
