As if I'm holding the key too long, but I'm not. It just started and it's been very cold. I've never had this happen.

I have a new 2011 Subaru Tribeca. The air conditioning stopped working on the drivers side but did blow cool on the passenger side then one day later it stopped working completely. My local subaru dealer had it 4 days and finally fixed the problem. The A/C worked great for 2 days then stopped working completely. It blows hot air. Has anyone else had this type of problem that was properly fixed? what was the solution? My dealer seems completely lost. Thank you