2002 Volvo S40 air conditioning blows warm instead of cold

We drove up to Maine for the holidays. Doing this, we put 100% antifreeze in the car and flushed out the old one. Once we got back the air conditioning only blows warm air and doesn't get cold. This sucks when you live in South Florida. Would it effect the ac if I have 100% antifreeze instead of Half and half? I checked the freon and the pressure was fine, not to much not to little.