Okay, good news is we found what the problem was, but there is a lot of bad news. The valve switch in the half bath was defective and not working. Replaced with new valve. Pulled out refrigerator and it seems that the refrigerator was somehow put on top of the plastic waterline hose. So, evidently it has been leaking for some time but it finally burst when we heard the "spewing noise". The weight of the refrigerator finally cut through the plastic water line tubing. Cut off that piece and reattached with fitting. Bad news is that the floor under the tile has been wet for some time, it just never seeped through until the spewing/gushing started. Floor between refrigerator and 1/2 bath is soft. Moisture meter reading was at about 38% in that area and went to about 18% on each side of the refrigerator (couch and bedroom). We are going on vacation in a few days then we will have to work on floor issue when we return. We purchased the RV new 4 months ago, so hopefully warranty will take care of floor issue.
I don't know if any of you have pulled out your refrigerator, but on the back was a certificate of conformity. The certificate is based on the consumer protection safety improvement act - 2008, but then it says "The certification is based on testing conducted by Whirlpool as follows; Date of Manufacture: See carton label; Date of Test 8-17-07; Location of Test: Benton Harbor, MI". Question - how can the test be performed prior to the adoption of the act? Maybe I am missing something here?