Do you have a dedicated 30 amp service for your TT at home
or are you plugged in to a normal 15 amp service at home?
If it worked at the dealer and campgrounds, but not at home, the problem is related to your home service. If it's 15 amp, do not plan on running the A/C.
It will trip the breaker. If you have done that once already, check the breaker in the house. Running the A/C alone will trip the 15 amp breaker.