Purchased this Fifth wheel a Travel Supreme 2005 last March and just started to use it two weeks ago.A strident beeping sound started to drive us crazy. Three successive beeps twice, sometimes, one single beep some other times at different intervals. Sometimes it was 24 hours before the beeping sound started again. Checked the LP sensor, replaced the LP sensor (In case), disconnected the 12v battery, disconnected the power converter a Inteli Power 9100, disconnected the awning wind sensor, removed the awning fuse , checked the voltages , disconnected the vacuum cleaner, called an RV tech for advice, called the original owner for advice and asked why the smoke detector had been removed and could not be located( he didn't have a clue), replaced a new smoke detector, climbed the roof to blow in the awning wind sensor, made sure all the valves of the propane tanks were closed, searched for hours different RV forums, removed all deodorant from proximity of the LP gas detector, made sure the dryer timer was really at OFF position, told my dog to stop passing gases. Again, this morning..beeping at 04h00. Our dog ...again..going crazy...WE are going crazy !!!!!!! I finally climbed on top of the RV, blow in the wind sensor, maybe some insects within. Noticed lots of water on the awning over the left slide-out. Climbed down,use the ladder to try to remove as much water as possible from the top of the awning and then.....what do I find, outside, between the slide-out and the awning ??? The old smoke detector !!!!What the heck was it doing there? No clue!!It was obviously the alarm indicating low battery voltage that was driving us crazy. We can now start enjoying our fifth wheel !!!! see attached picture to view owner's mood this morning !