Trane XB13c blowing lukewarm air
Hello,
I have a two year old Trane packaged system (XB13, model 2YCC3024, 2.0 tons) that is blowing the heat at 77 degrees. Needless to say, in this cold, that means the house is around 60 degrees. The unit runs constantly, and we do not have an emergency heat setting. It is one of two units in my home, and is the downstairs unit. Each floor is roughly 1200 square feet. The upstairs unit is in the attic, is 11 years old, blows at 114 degrees, and works perfectly keeping the upstairs at 68 degrees. Repairman was out and could not find anything./Any ideas what might be causing this?
Any help or ideas are appreciated. Thanks!