The a/c works well for the first hour then the blower blows warm air. I shut the

System has one of a few problems. Without physically looking it is hard to tell. System can be clogged, low on freon or new compressor could be deficient. During repair of compressor did anyone add dye to leak check? If so look at the fitting around repair. If dye is present, system is leaking. Lines will need to be tightened and system recharged.