Are you plugged into a 50 amp circuit?
Will it work if you unplug and then run the generator?
Check your DC electric meter. Does it read full? It should read full battery. If not let us know. ..
Are your lights dim? Part of the question above, if the battery is full, and lights not dim, that is normal. If dim, and battery reads 1/4 or less, you can start the engine to recharge the battery, if the thermostat works while the engine is running, it indicates a problem with the converter and fuses connected to it. .
Hopefully it will not be to hot this weekend!
Fred.