I periodically sit on this forum and help different people. If you have a problem with the fact that your air conditioner does not work well or does not blow out the cold, you most likely have a problem with the radiator. Periodically, you need to clean the air conditioner. If you do not do this, it does not work well. By the way, this was suggested to me by my friend who works at the service for repairing and cleaning air conditioners
https://www.marvellous.sg/ . I hope that my advice will help you and everything will be fine for you. If none of the above helps you, you have a problem with the details, which is already bad.