At first the tech said I needed to have freon added for $149. and also cost of a diagnosis call, $89.99. I told him I had already a diagnosis call and nothing was indicated as being needed and his office had said that there would be no charge for the diagnosis. I told him I would think on the freon. Brandon called back and said he went ahead and added nine oz. of freon and wouldn't charge for the diagnosis call. There was no charge for the service. That restored my faith in Interstate and the owners, Kai and Jamie.