when the air blows, check to see if a gas smell appears. If it does it might be the evaporator. Usually the right side starts not cooling.
Update: Using the feedback that a sensor or connector might have been loose, I looked for all connectors I may have come accross and found one I thought I had secured at the A/C Evaparator that I had disconnected trying to figure out how to get underneath to the Emissions Air pump. Anyway, I secured that connection and now I have icy A/C again. Nice to have it back even though I wont use it again for 5 months... Thanks all for the leads they helped my narrow down the problem..