This has been a problem with a lot ot the Columbus models. Check your connections, they use twist on type connectors and nthey are horrible. I also understand that some of the connections have been reversed behind the wall plates, I have also heard that the connection in the outside conveience center is not connected behind the wall. Check everything before decidind which one to persue. Also the bedroom sat connection is not hooked up either.
Scott & Vicki
2015 Silverado 3500HD 6.6L Duramax/Allison
2013 Columbus 295RL
Camped 2013 110, 2014 129, 2015 97
2016, Camped 69 nights, 25 Nights Reserved