Emergency water heater help

Hi to all on the forum. I need some water heater help so the wife doesn't kill me. LOL we own a 2012 Gulfstream conquest 33 foot. I have a switch by my kitchen cabinet that says water heater with a red glowing light that says reset. The switch says on and off. On the outside of the trailer inside the water heater box there is also a on off switch. This morning after making sure that the water tank was full I turned on both the inside and outside switch to the on position. The red light inside the trailer stayed lit. We had hot water but only a few seconds worth. I am currently trying to fire it up using the LP gas, but there is nothing happening either. The red lights inside the trailer is no longer lit and I still have no hot water. Is not the LP gas separate from the electrical side of this water heater? Should I not still be able to get hot water from the LP gas side? Am I using the switches incorrectly? Should I not be able to light this with a lighter if the igniter is not working? Sorry for all the questions, but coming up on Sunday I really would love to have some hot water. Thanks guys