A/C blowing hot air?

I bought my 09 Chevy aveo from a reputable dealer in Sept 2013. It's been running great including the A/C till last week. I thought it might be low on freon. So I had the local shop check the freon level. I was told it's suppose to read at 30 but it's reading at 60. I didn't add anything to it. The compressor clicks on when the A/C is turned on. I drove away with more questions than answers. I was thinking just let some freon out. Then my neighbor said sometimes the condenser or filter in the front gets dirty and just cleaning it might solve it. I can't find it. I'm taking it to the dealer tomorrow. The extended warranty I purchased with the car the Deductable is $100. Is there anything I can do that I can check and maybe save the $100? Then if no luck take it in. Thanks , jonathan