BMW 320D E46 Climatizer Problem

Hello everyone, it is the first time I write in this forum, to see if someone can give me any idea about a problem that I have.

My car is a BMW 320D (E46). A few weeks ago, I began to notice that the air conditioner is disconnected alone and connect again. It only happens to me with cold air.

I explain: when I press the air conditioning button, start the cold air, but after a few seconds the air continues to come out with the same force or intensity, but it is no longer cold air. It is an air like when I disconnect that button.

When disconnected, noise begins to be heard through the inner air ducts as when I disconnect the air conditioner.

What can it be due?

Now at this time, you can go perfectly with hot air, but when summer arrives I will have to repair it without further remedy.

Thanks in advance and greetings to all !!

He lacks refrigerant atu system you have a leak, complete with a recharge and see how much the cool or metelo lasts to review of leaks in an A/C workshop lasts but they will find something and you will cost you a ticket greetings