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If you want to clean the contacts on the board, you will unplug the freezer and remove this board to start. Then with a q-tip and alcohol, lightly rub all the pins and connection points where the wires connect onto the board. Then use a pencil eraser to rub over top of the flat connection surfaces where possible and reconnect the wires and re-install the board. Other than that the board would just need to be replaced.
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