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ensuring the furnace pressure switch closes to initiate the ignition sequence
Always match the rotation to your fan motor data plate
0131M00003S
15 inches of water column activation is mandatory to meet York OEM specifications and maintain safe combustion cycles
First Company CB103B Circuit Board Freon ensuring the furnace pressure switchThe First Company CB103B Circuit Board (Model 1102 1A) is a critical OEM replacement control board designed for high performance management of HVAC air handler operations. As a direct fit replacement for the original 1102 1A and CB103B series, this board regulates essential system sequences, including fan motor control, heating relay activation, and cooling cycle timing. Engineered for First Co fan coil units and multi family residential air handlers,
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