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The Bard 8602-056-0001AX Programmed Econ Module - DB Temp is an OEM economizer control module used on compatible Bard wall-mount HVAC equipment to manage free cooling operation based on outdoor dry bulb temperature inputs, helping the unit bring in outdoor air when conditions are suitable and reducing compressor run time. When an economizer will not enable, will not modulate correctly, or is showing control-related faults, replacing the programmed module with the correct Bard part number helps restore proper economizer sequencing and reliable damper control. Confirm compatibility by matching the exact part number from your Bard unit or service literature, since programmed economizer modules can vary by unit series and control configuration.