AC only works after 10-15 minutes
 

So, I have a weird problem. My AC takes about 10-15 minutes to start working. It blows immediately, but blows air at whatever temperature it is outside or in the car, and only starts pushing out cold air after the car has been running for 10-15 minutes. It did this last summer too, but the VW dealership couldn’t find anything wrong. I haven’t worried that much about it because, once it does come on, it works perfectly and doesn’t go back to blowing warm air until the car has been off for at least 12 hours. If I turn the car off, and then start it again within a relatively short time, it works find.

Has anyone ever had this issue or has any idea what is causing it?