I have been reading several posts over the last few days and I hope I am giving enough info here for someone to help me out.
I have a new house and the a/c will not cool the house down past 80 during the heat of the day. In fact the temp will climb to 80 from 75 in the morning. The unit will run from 7am until 9pm non-stop
The house is located in NE Ohio and the rear of the house faces South West and gets sun all day long. The house is a 3200 square foot colonial with a walk out basement and has 13 very large windows in the back, 8 of which are in a sunroom that has exposure to the East South and West. I do not have any blinds on the back of the house yet. I will be installing those very soon. I have all of the vents in the basement turned off to help get the air to the main floors.
The outside temps have been in the upper 80s and low 90s during the day and going down to upper 60s low 70s at night.
The unit is a Trane XB10, 4 tons and is located on the West side of the house. There are no trees as of yet, housing development was an old farm.
I have checked the temps at the register, closest to the unit is 64 and upstairs is 67.5. My main concern is this unit is simply too small for the house. I do not know what type of calculations were performed to arrive at the unit size, I have a call into the builder to have the HVAC people come out.
I am looking for any information on this, is the unit too small, what should I ask the HVAC contracter to do. Is this acceptable? I have ready 1 ton per 400 sqft, that would be an 8 ton unit, which seems a bit much. Basically I am looking for any help I can get so I can have this resolved.