Originally Posted by steveandbarbara
The valves are open. As a matter of fact, it stopped working during a camping trip. Thanks for the suggestion.
How many valves behind the water heater do you have?
If three valves, you want the hot and cold lines open, with the bypass line (the line that connects the hot and cold lines together) to be closed.
Another culprit can sometimes be the outdoor shower valves are turned on (but the head itself is turned off), which also lets the hot and cold lines mix together. Have you checked them?