A/C out . . . again

Our guy came out on Thursday to recharge the freon, and Sat pm it was hot again. He came out today, Memorial Day morning, took a look, and pronounced our coil in the attic out..... He recharged again hoping it will get us a little through, but it was just leaking into the house. He had a sniffer thing and when he came into the house, it went off. I wonder what I am breathing. So~~~~~possible Thursday at 6:30 AM (did I tell you it is VERY hot in a second story attic in TX in the summer) he installer will be here to do the job. .......can you say CHA-CHING!