I usually cure problems lying in bed at about 5am - so after watching the videos I determined there must be a problem at the thermostat because the mode does not show a heat cycle, cool only.
I looked at Suburban manual and it showed an on/off switch on the unit so going to check that out. Fuses work OK so........on to new resolution.
Actually, trailer was a year old, never used, people decided they didnt like pulling a trailer, prferred a hotel. Happy with my acquisition thus far.
Tnx for info. If anyone has a resolve to the problem, let me know.........want to touch all bases before going to the dealer.