I also encountered a similar problem last summer. I was advised to contact Customer First Air Conditioning, and I was very satisfied. They provided a complete air conditioning service, checked the old system, cleaned the filters, and also performed diagnostics to determine whether it should be replaced. The technician explained that the problem is often caused by dirty air ducts or old refrigerant. After their service, the air conditioner started working much more efficiently, and my home became cool and comfortable.