We've been in St. Louis for a little over a week now. While we have been toasty warm inside the motorhome, it's been pretty cold outside (7 degrees F).<br/><br/>A couple of days ago we had quite a surprise when we noticed a block of ice growing under the motorhome. After some frantic page turning in the manual, it seems that one of the AquaHot drain valves wasn't all the way...