We hired this company for what we were 99% sure was a refill of freon. They were very quick to come out and extremely nice. The guy that came out was so helpful and kind, but told us it wasn't the freon. He checked some things out and said we needed to have our coil replaced (a very pricey repair). He suggested we look into our home warranty - which we did. The warranty people came out and said it was definitely not the coil, but that we were low on freon. He filled it up and our a/c has been running fine ever since.