First, our air conditioner needed to be replaced. Then our whole circuit panel needed to be replaced. All under warranty; but still a real pain trying to get someone to fix it. We are on a seasonal site and need repairs done on site. Now our air conditioning and heat come on; but when the set temperature is reached, it doesn't shut off. The only way we can get it to shut it off is to shut it down manually. Would this be a thermostat problem? User's recommendation: Make sure you use your rv a lot, when you first get it. If it needs attention, make sure you get it taken care of while warranty is still in affect.