First Company CB103B Circuit Board Freon The 26AC series is widely

The 26AC series is widely utilized as a pilot regulator for larger control valves or as a standalone small-bore HVAC pressure regulator

Inspect for a dirty air filter

15 inches of water column activation is mandatory to meet York OEM specifications and maintain safe combustion cycles

including the legacy Barber Colman TK-2

First Company CB103B Circuit Board Freon The 26AC series is widelyThe 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,