First Company CB103B Circuit Board Freon OEM Compatibility: Replaces common Robertshaw

OEM Compatibility: Replaces common Robertshaw pilot assemblies used across various furnace

Enhanced System Stability: Eliminates rapid temperature fluctuations and "cold blow" issues common with failing HVAC sequencers

Using a switch with an incorrect temperature range can lead to safety hazards or frequent nuisance tripping

ensuring the furnace pressure switch closes to initiate the ignition sequence

First Company CB103B Circuit Board Freon OEM Compatibility: Replaces common RobertshawThe 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,