[Leisure Time Larry]

Just to clarify, you are getting a steady flow of cold water out of your faucet when the HOT water is turned on? How long are you letting that water run for? It could take a couple of minutes to get hot water flowing through all the plumbing on a large coach. Finally, you confirm that the water heater tank is full of hot water? If so, then the only things I can think of are that you need to let the water run longer to get hot out of the tap, or that there is indeed another valve(s), likely near the water heater on the inside of the coach, that control bypass and they need to be turned properly for normal flow. That makes sense to me since just turning off the cold water valve, (#9) on the manifold wouldn't alone fully bypass the water heater. It seems that would just prevent water from getting to the water heater. Yeah, I'm guessing there is another set of valves near the water heater and that the hose hooked to the manifold at hot #9 is the bypass line. Look for a way to access the back side of the water heater from inside of the coach.