For about a year now, I have had an intermittant problem with my ac. Every now and again, it will stop cooling. The fan still blows but the compressor stops even though its being called on to cool. After a while, it comes back on. It has not been so much a nuisance in the past but recently its beginning to stop more frequently and for longer periods.

Has anyone experience this? Is there a known issue or defective componenet? I have replaced one pressure switch on the freon tank but it didn't help.