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The Bard 8201-104 is an OEM 3-position CRV control board used in select Bard wall-mounted HVAC and packaged cooling applications to control the crankcase regulating valve (CRV) sequence and staging. When a CRV control issue causes unstable pressures, nuisance trips, or improper capacity control, replacing the board with the correct Bard part helps restore reliable valve operation and proper system performance. This is a direct-fit Bard control component intended to match the original electrical characteristics and connections, so verifying the exact part number against your unit model and wiring diagram is the best way to ensure proper fit and safe operation.