Lite the propane heater and it started and I kept busy with other projects and a noticed the heater had stopped a short while after. tried to re lite and noticed that the red light at the switch over the sink was not on..... Have i killed the heater or is there a fuse or reset switch I am not seeing ???
Start with the simple first: Make sure the water heater tank has water in it. Make sure the propane line does not have air in it...bleed the line by lighting the kitchen stove.
Red light would come on if water heater faulted for some reason. Are you sure it quit working or got up to temperature and the thermostat shut it down?