I had this problem on basically the last day of our Christmas vacation to FW. The detector would go off again and again. Finally after resetting it several times and moving some air about it stopped. Now, I just got some repairs done to my unit, including an apparent small leak around the water heater. I've got the unit at home, no propane even going at the moment, and what does the detector do tonight but go off again and again! Anyone have any ideas on what might be causing this? I can't just turn the thing off except to disconnect all power. My unit is an '04. Could it need replacing or cleaning? We leave for the Fort in 11 days and I don't need this headache right now.