Help, recently replaced 8.5 ton (3 units) with single 5 ton zone system (Amana) Located in Dallas, TX 3200 sq.ft home.
Home never reaches set temps (always 3-4 degree off), all zones calling for all all day/night long. Contractor has by-bassed air/zone sensors, moved control to thermastats. Now home not taking care of humidity and still not reaching set temps. Now they want to install an addtional 2 ton (3rd stage???)unit.
I have poor air circulation in one zone and the rooms that do get air sound like a freight train. I do have their load calc's and general data.

Looking for some suggestions/help. Will answer questions the best I can.

Thank you all in advance