I moved into a newly built house 4 years ago.
I had complained to the builder about the AC not being that cold - it's cool but not as cold as every other AC that I've had. It cools of the house but takes a while.
A few days later, guy calls and says he checked my AC and it's find and that I can't expect to get cold air. I had said it takes forever to cool the house and he says it's a energy-efficient model that I need to keep on all the time.
So now a few years later, I call for a checkup/cleaning. The guy (not the same AFAIK) says it's not that cold and the freon is low. He said he would check it out and spent about 5 minutes by the AC and came back and said my coil is leaking. Got a call the next day that parts were covered but it $2500 for labor and freon.
This sounds a little fishy to me. If there's a leak, wouldn't ALL the freon leak out and I wouldn't have any freon left to cool the house? It sounds to me like the freon has always been low and the leak is an excuse as to why it's not their fault but I couldn't just paranoid.