We did our first full hook-up trip, just to try out all of the systems. I turned on the water heater and after a while checked and had hot water, then just left the switch on. It was a warm evening and we had our windows open and in the middle of the night the water heater burner ignited and was so loud it woke me up (I didn't know what it was until snooping around in the dark.) I flipped off the switch and went back to bed.
My question is, should I just turn it on a half hour before I need hot water and then off again when I am done (or for the night?) Also, is it odd that the burner ignited in the middle of the night when the was no demand?