I have a 2003 Pace Arrow parked at my house plugged into 30 amp service. The propane detector will not stop beeping. My batteries are both charged at about 13.65 v. I turned the propane tank off about an hour ago. I hit the mute button and within a minute it beeps again. It's been about a month since I have used the RV. I did this a while back and seemed to have stopped on its own. Any suggestions quiting this thing. It's becomming quite obnoxious.Thanks.