Abstract: The embodiments disclosed herein provide an electronic control system for adjusting power to a heater to prevent condensation from forming on, for example, one or more glass windows on the one or more doors of one or more refrigeration units. The control system can adjust the amount of heat applied to the one or more glass windows based on the ambient temperature outside the one or more refrigeration units, the ambient humidity outside the one or more refrigeration units, a target refrigeration temperature for the one or more refrigeration units, the structure of the one or more door windows, and/or a property of the one or more heaters, such as the maximum heating capacity of the one or more heaters.