Not sure if this is the correct place to post this. I'm brand new to rv'ing and and own a 2010 heartland 35dsrl. I was under the impression that all my pipes and tanks were heated with my furnace therefore eliminating the possibility of freezing water line. However, the water lines to my kitchen sink (both hot and cold) are frozen and the lines from my hot water heater (near my kitchen area) back to my bathroom are frozen! I have ran my furnace all day and still not water in kitchen or hot water in bathroom! Am I doing something wrong or do I need to be doing something different? Any help would be so appreciated!