Found the upstairs system not cooling due to a faulty dual run capacitor in the condenser outside. I replaced the capacitor under parts only warranty. The system is now cooling properly, cooling the air down to 58 degrees As for the moisture in the downstairs storage room, I don’t believe there is any duct work above that ceiling, I believe the moisture is from the humidity in the room and their being an air handler in the room. I would condition that room with a window unit or spot cooler, replace the plywood, then paint with a kiltz base paint. Billable