Unit working upon arrival. checked probe connections & continuity, good. Reworked ground connection. Reassembled & tested. Calling for water. Jumped out probes to ground, didn't change. Board is bad & will need replaced. Pt# AT0E-3230-1 $174.46. Labor & part all together approx $550-$600. Would like written quote sent to Anthony.Petrone@undltc.com 10/18/17 Installed new board and drained water. Cleaned probes and filled up. Checked operation