I have a new 2011 3670RL and I am trying to figure out how to use the hot water heater on propane. I have full timed in RVs for a lot of years and have never had this much difficulty with the gas water heater. I have the switch on the hot water heater and a switch inside the trailer marked electric hot water heater. I have tried these switches in every combination I can think of. I called my dealer and they said that the switch located on the H/W heater should be off, and the inside H/W heater switch should be on. This does not work, and does not make a whole lot of sense. He said that there should be another switch located inside the trailer, but I am yet to locate it. I am sure that there is a simple solution to this problem, but at this point I feel brain dead. If there is someone else that has had this issue, or knows the answer, any help would be greatly appricated.