Went to take a shower in our new MH that has the Truma Aquago Endless Hot Water Heater this weekend and the hot water would only get luke warm. Too cool to take a shower. Two weeks ago, it worked just fine. The trouble shooting begin and after about twelve hours later, my wife reached out to Facebook for help. Luckily a quick response said to check the outside shower to make sure both the hot and cold water faucets were off, because if they wasn't, the hot and cold water would mix. Sure enough, that's what it was. FYI, make sure you turn the outside shower faucets off.
John & Becky
2017 Fleetwood Discovery LXE
2015 Chevy Traverse