I have a three year old trane central AC (3 ton I think), in a 3 year old 2 story 1,800 sq. ft. house. During the hot part of the day, the airflow from the vents is diminished. The house warms to about 80 degrees, and the air continues to run.
Was the system sized properly for the structure? That unfortuately is the problem in todays world. If the A/C is oversized it will cool down the temp too fast to acheive proper dehumidification. If undersized, it wont keep up with the heat load. Duct work in not always sized properly. This will affect the system operation as proper air flow is critical to proper operartion and comfort. Unfortunately our industry is crying for qualifide techs, installers and designers. Too many turd hurders in the business today. Get a truley qualified tech to evalute your system, and recommend proper soulutions such as zoning, 2 stage, dual system, etc. Good luck.
I HAVE TO AGREE WITH GASMAN. IT SOUNDS LIKE A DUCT ISSUE.
MANY CONTRACTORS USE FLEX DUCT INSTEAD OF HARD PIPE WHICH
IS O.K. TO USE BUT, A GIVEN SIZE SUCH AS 12' FLEX DOES NOT
CARRY AS MUCH AIR AS 12' HARD PIPE. ALSO PROPER DUCT DESIGN
IS A BIG ISSUE. GET A CERTIFIED SERVICE TECH TO EVALUATE
YOUR AIR FLOW PROBLEM. ANY QUESTIONS OR CONCERNS E-MAIL ME BACK