If they come to your house make them leave cancel your American home shield contract if they won't send a local reputable company they will tell you you need 15 pounds of freon because they want you to buy a new unit they will tell you it cannot be converted to the cheaper freon 407c instead of r22 because they want to charge you $100 a pound and about 10 lb over what you actually need they are criminals the owner belongs in jail User's recommendation: Kick them out of your house.