My Atwood 6 gallon electronic ignition water heater will not heat water whether I try using gas or electric. The tank is full with no air in it, I have checked the circuit breaker and all fuses are good. The gas igniter doesn't click to fire the gas and if turned to electric,---nothing. Any suggestions on what might be wrong? I'm supposed to leave next week for a trip, but I don't think the wife would go without hot water.