If your water is frozen then you might have some cracked pipes too. I had an old camper and the pipes froze one Winter. When they thawed I had water pouring all over. Be careful. It was a MH with a basement, 1988. I had a bulb in the basement to keep it warm and it worked to keep things from freezing until one night when the bulb went out. On the newer RVs they have the Furnace ducting from propane to keep the basement warm and pipes from freezing. I also keep cabinets open. On the outside, use heat tape and foam insulation. So far my 2012 5er has had no issues.