The mk5 AC compressors have a higher than normal failure rate. Basically, the pulley is spinning all teh time, there's an internal valve which controls if the freon is getting compressed. This valve can fail, means you need a new compressor. Any error codes? I don't know if autozone scanners will pick up the climate control module though.
VW TDI forum, Audi, Porsche, and Chevy Cruze Diesel forum
A forum community dedicated to Audi, Volkswagen, Porsche, and all turbo diesel owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, TDI, maintenance, and more!