My Rheem 2 1/2 ton heat pump stopped blowing cold air last night. I live in Alabama. It didn't cycle like it would normally do. It just kept blowing slightly and not very cold. This unit was installed 3 years ago. I only had the guy who installed it, come out and service it. He came out 2 months ago and serviced it. After a night of sweating and not sleeping... I called him and only got the answering machine. I called another guy because of a referal from a co-worker, this guy said he'll be out soon today. I went outside this morning and looked inside, where the fan is located, and saw ice pieces and one piece still connected to a line. I turned everything off. Any ideas???