Our BC 3510RL started having a "damp" floor on the port side of the pass through near the control center.
Pulled open that false wall behind the control center, and found a couple of plumbing joints had "almost invisible" leaks back in that jungle of valves and bypasses. These joints were ones with "flexible hose" tubing (instead of the regular PEX tubing). In our rig (2011 model) most of the plumbing is the rigid red/blue PEX with crimp fasteners. All of this was fine. The leaks happened where they used screw-type "radiator clamps" and plastic elbows/tees with the flexible tubing. I replaced all the pressurized "flexible hose" tubing with regular PEX, brass elbows/tees, and crimp fittings. Took me a whole day, and $150 in parts and tools, but no more leaks due to "economy/time saving" (cheap) craftmanship at the factory.