Depending on the hardness of the water, deposits will build up on the heating element and make noise when heat is applied. Not something to worry about, it happens with your home unit also. Home units are usually located where you don't regularly hear it, however.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
|