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• 8408-023 OBSOLETE

• DEFROST SENSOR FOR 621-230-1

Bard part number 8408-023 is an OEM defrost sensor specified for Bard control 621-230-1, used to monitor coil temperature so the defrost circuit can initiate and terminate defrost at the right time during heat pump operation. A properly functioning sensor helps prevent outdoor coil ice buildup that can reduce airflow and capacity, while also avoiding unnecessary defrost run time that wastes energy. This replacement is intended to restore correct feedback to the defrost control logic for reliable cold weather performance and proper system protection; always confirm your unit model and the control board or kit callout in the Bard parts list before ordering to ensure the correct match.