Unit is being sold for parts, and shows heavy signs of use, as well as some possible electrical issues. When power is connected to controller, there is almost always a spark that shoots out, and controller sometimes smokes from this point as well. No obvious damage or distress to either component to explain this issue, so I'm not sure which component might be the problem. Power has not been connected to pump as a result of this issue, and further functionality is unknown. Will be packaged and shipped carefully same or next day by an experienced seller.