Welcome to the forum. I think your thermostat is on the bedroom wall opposite the bed if the attached Utube video is "actually" your coach. It should control both heat and A/C. Yes most RV air conditioners can be noisy and in many cases run for long periods especially when the ambient outside temp is high; you are camped in the sun and you have the air conditioning set for low inside temperatures. The walls are not as well insulated as we would all like them to be.