Burned out our element last summer and have been running on propane since. Decided a few days ago to replace element and anode rod. After replacement filled the tank and turned on the switch-still no hot water. The resets are not popped out at the water heater and the breaker inside is not tripped. Thought that I'd read somewhere on the forum that it didn't matter which wire went on which terminal, but I swapped them to make sure. What now???