I agree that you should contact special services for that. I think the problem is that it needs cleaning or something like that, but of course, a specialist will tell you more. You can contact Duct Cleaning NJ, and I believe that these guys will help you with your AC system, and it’ll work all right.
I think it always makes sense to contact some service centers or companies where you bought something. For example, I recently bought a deep cycle agm battery, but I had questions about how to use it, so I wrote to renogy, where I bought it. Specialists helped me figure it out, so now I can safely use it.