We have a 2007 Fleetwood revolution. It is plugged in all the time in a 3 sided building. ( front is open, the unit is back in) It makes a chirping noise. It looks like everything is normal when we go...
I once got one of those little devices that makes a random "chirp" with no pattern of when it will go off. I hid it in the office (large room with multiple desk cubes). After a few days it started driving everyone nuts. I moved it around a few times and then folks really went nuts. I finally retrieve it and brought it home. It was a fun trick, and to this day I never told anyone I was the one responsible. Those chirps can drive you batty!