ihavea92prelude

I recently had my a/c running ice cold. It took some fixing but it finally started working great!

Here's what I did:

1) Got my a/c control module contacts fixed (via eBay)
2) Replace a/c pressure switch
3) Vacuumed out system and had new freon installed

Worked awesome for about 3 weeks, then suddenly I started it up in the morning and ....nothing but hot air. I jumped the a/c pressure switch and the compressor came on but the air was still not cold. I check the freon and it is still full. I looked under driver's side fuse box but no fuses on a/c system as well as under the hood (passenger side).

What could it be???
HeeeeeeeLP !!!