Ok, so some answers and some thoughts...
The 'salesman switch' is the switch (usually by the front door) that cuts off all house power to the coach. Usually used for long-term storage. Since you have 12v house lights then that isn't the issue.
If you were not running on the gen, then to get 120v AC your inverter would have to be "on" and drawing power from the batteries. Since you are using your gen, it's not involved either.
So now it comes down to... is your gen running ok and producing 120v, and/or is something blocking it getting to your plugs.
On your One Place utility panel in the coach, does it show the gen running and power coming in (i.e. is the "gen set" light on and/or does it show amperage?) If so, then AC is getting that far. If not, then you need to work back from there. The gen itself has circuit breakers... check them. Check any error codes on the gen's display panel. Possibly the Automatic Transfer Switch isn't working properly, but that's a bit harder to diagnose. (The ATS is what switches the coach from shore power to gen.)
If the panel shows "gen set" then power is getting that far, and the issue is downstream, perhaps the 120v circuit breakers. You have said no power to plugs... do you have AC anywhere? Does the microwave work? How about the basement air? Electric water heater?
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Ed & Joie
2004 Vectra 40KD
Freightliner Chassis and Cummins ISC
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