Air conditioner does not blow out cool air anymore
I moved to my current home about 11 years ago. Ã¯Â¿Â½The air conditioner unit Carrier model 48kha, kla was already installed on the roof; I have no ideas when it was installed. Ã¯Â¿Â½Since moving in I only have it serviced/repaired one time, that was about 7 years ago when I heard kind of a banging noise and then the unit blows out hot/warm air when it supposed to be cooling. Ã¯Â¿Â½If I recall correctly, the problem was a loose compressor and the service guy repaired. Ã¯Â¿Â½Since then it been running OK although I do notice the cooling air is not as cool as before over the years and becoming noisier. Ã¯Â¿Â½Now since yesterday, the air conditioner cannot cool down the house any more (the temperature remain the same after running it for more than 1 hour). Ã¯Â¿Â½I noticed when I turned on the air blowing out seems cool but after a few minutes it became basically neither cool nor warm. Ã¯Â¿Â½I also noticed that it does not discharge water (dehumidifying?) since. Ã¯Â¿Â½What is the likely problem and what is the general cost for this service? Ã¯Â¿Â½Please advice, thanks!