Hi, We have recently had a very strange experience: Our onboard propane detector started behaving oddly at intermittent times. For no apparent reason....at any hour (DAY OR NIGHT!!) it would start beeping it's alarm! We did a thorough inspection of all propane hoses, pipes, connections, furnaces, stove, hot water heater, etc....EACH TIME it blared!!! When we couldn't find any problems (no bubbles w/soapy water, no odors, no flames where there are not supposed to be flames) we turned off the propane and gave it a rest. When we turned it back on again, it would be fine for weeks at a time. Then, again for no apparent reason the alarm would go off again! This went on for a few months...sporadic...no rhyme nor reason. Finally, took the coach in to Suburban Propane to have them do a complete inspection...their conclusion: Your Propane detector is defective. OK....that's good....at least all the lines and everything are ok and we did the right thing making sure we had a complete inspection. Bought a new propane detector and it works great....not a peep out of it since we plugged it in 2 months ago. I sent the old one back to CCI (the manufacturer) and asked them to please send me a check for the cost of the new one...and I enclosed the receipt. CCI sent a box back to me...and I thought...."HMMMMMMMMMMMm that's strange, I was expecting a check." I opened the box and there is what I thought was a NEW propane detector. Upon reading the packing slip enclosed, it stated, "Return to customer, detector is working fine." What does this mean??? Was Suburban Propane wrong? Was there really nothing wrong with the detector? If so, why did it alway beep? How come the new one is good? Strange happenings....we are holding onto the old one and keeping the new one plugged in. Has anyone ever had anything like this occur??