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Brand New Heat Pump and AC Can't Cool House to less than 75.
We had a new Trane, XR 14, 2.50 Ton HP Condenser Model 4TWR4030 and Trane, Hyperion Series 2.5 Ton Air Handler Model TAM40A30 installed last September. The installer supposedly tightened up all of the duct work in the attic. This is a two story bungalow with 1400 SF on the main floor and no ductwork to the basement except for one return vent to pull out humidity and we live in Maryland. We really didn't use the heat since we have baseboard hot water which we prefer. The last few days the temperatures have been in the 80s-low 90s. The tstat is set for 75 degrees and the thing runs all day until it cools off in the evening. I've taken temps at the supply vents and on the hottest days the temp difference between the return and supply is less than 14 degrees to only 7 degrees from the back bedroom. When the outside air temp is in the low 80s it ranges from 9-16 degrees difference from indoor air.
The previous unit was AC only and the air handler was 110 volts, the new one is 208 and the system is using the existing ductwork but as I said they checked it when they installed the unit.
Shouldn't a new unit perform better than this? I'm going to have the installer come out again since its still under warranty but I just don't understand why I'm not getting better cooling. Any suggestions on what I should ensure he checks?
Thanks in advance,