How to get my air conditioner working using the generator?

Thanks for the tips but we have to hit the road very very soon and I think the best would be to visit a good garage that maintains such motorhomes in Toronto and to pay to someone to go through everything with us. Unfortunately the air conditioner is not working properly as well so we need someone to see it. We don't want to go without air conditioning in this weather... any ideas - we are in Toronto, east part near the lake - southeast Etobicoke, Port Credit, Oakville?