Arrived to no cool, blower wheel was squealing, also unit was frozen, leak in coil, customer has had unit topped off twice this month, disconnect also sparking. Recommend replacing unit. Other unit compressor would loudly start and and stop right away. Disconnect was off when I arrived, 2006 unit, out of warranty, gave option to replace compressor and replace unit. Left fan running only on frozen unit, to help defrost over the weekend.