I bought a 2012 Winnebago Adventurer 35P recently. Everything was until today when I had no more hot water available at the faucets. I am connected to the city water. Water heater is electric and on and the water is hot in the reservoir. This morning after our showers, no more hot water available. Cold water is normal. No water at all is coming out on the hot side of the faucet. Any suggestion for the solution?