Incomplete 2 Systems worked on US Rheem HP Split System: HO stated condenser unit was not coming on. He got maintenance done and they told him defrost board was bad. Found bad defrost board bad. Common side coming from defrost board to contactor not working. Defrost board needs to be replaced. Called Dealers Supply in Raleigh. They said board is not under warranty any more. P#: 47-102684-204. Price: $44.01. In Stock, ready for pick up. PO#: 78070. Part on order.