issue except that with the second heat exchanger installed it never got hot. It was heating up prior to the OH with only one heat exchanger but the water was much hotter in Mexico. Coming back to the states and cooler water should have fixed the problem. It did last year when we came back. I'm trying to figure what the difference is between then and now. Anyway, I noticed that when we only left Brendon for 6 weeks it seemed like a disaster struck. I had flippen bird nests in the sails and big patches of dirt on deck. Not dust but dirt! I'm glad to hear the interior was good. No mold is a good thing! When are you getting back?