Is your hot water heater on? If so, is it on electric or propane? We had the same issue on our Passport the first time out with it. It kept shutting off and on constantly. After posting questions on the forum someone asked if we had the hot water heater on electric mode. We actually did, and after turning it to propane the air began working normally. I suppose the electric hot water heater was pulling too many amps for the air to run like it should. Now we will heat the water up with propane, then turn it to electric to maintain it. We will also switch to propane when taking showers to avoid the extra pull on power while running the air.
Hope this helps!
James and Willa
2014 Keystone Passport 2650BH Grand Touring
2006 F350 Powerstroke Turbo Diesel DRW