In order to operate at peak efficiency, every steam heating coil in a dry kiln must fully purge the condensate that forms within it. Failure to do so results in a condition known as waterlogging, where a portion of the coil becomes flooded with condensate. Waterlogging is recognized as an undesirable condition that leads to uneven heat distribution and increases the corrosivity of condensate. This paper reviews a unique method to detect waterlogging, and assesses its impact on the lumber’s moisture content.