We purchased an AC unit model number 24ACC424A0030011 serial 0817E08039 on March 4, 2017 from Estes Services which cost us almost $7, 000 for our downstairs area and the unit stopped cooling during the month of July 2019. We have run this unit for only two summers and now we are being told that the coil needs to be replaced. We are being asked to pay for the installation of this coil which is totally unfair since the unit is not really that old. The Technician told us that the refrigerant had leaked out so we had to pay to have more refrigerant added until the new coil can be ordered and installed. This too is very unusual for a new Carrier unit. We thought that Carrier units were reliable so we even purchased an additional unit from Estes Services on June 20 2019 for upstairs area thinking that these are good units. We don't feel that we should have to pay out of pocket for anything as the technician mentioned that the coil was covered but not the labor. This is very disappointing and unacceptable for a name brand such as Carrier.