It is likely caused by a low battery. Look beside your island in the kitchen on the step side and you will see it. That thing about caused a divorce for me lol! Cost is about $100 so make sure your coach batteries are not dead
from what I read on them they have a life of approx. 5 years...had plenty voltage to it account batteries are new...replaced it with same kind from amazon...no more beeping..tested it with a butane lighter and it went off...then it went back to monitoring...2012 31 sl
If you have left the batteries on board and have not shut off the main power switch, and your fridge doors are open, the fridge will beep. Make sure you fridge is shut off and your main switch is off, beeping should stop.
This is a common problem, we think the smoke detectors are hard wired, but they are not. They run on 9 volt batteries. I change mine out on my birthday. Gives me something to do. You should change them every year as you would in your home detectors.