I moved into my house about a year ago and the air doesn't seem to be cooling good - We live in Alabama. I have two units that the previous owner said were put in about two years ago - the house was built in 1985. They are both American Standard - upstairs unit is; Furnace, AUD040C924K4 Freedom 80 Single Stage, Condenser 2A7A3030A1000AA, Coil TXC030C4HPC0. Downstairs unit is; Furnace AUD080C936K4 Freedom 80 Single Stage, Condenser 2A7A3036A1000AA, Coil TXC036C4HPC0. Upstairs is about 1000 sf with 8 ft ceilings and downstairs is about 1800 sf with 9ft ceilings. When it's in the high 80's low 90's we can't seem to get the house cooler than 76 - When it was in the high 90's last week it wouldn't cut off all day!!!
First question - Are these matched systems, i.e. - are all the parts correct and designed to go together?
Second question - It looks like they used the old existing 5/8" linesets and adapted them up to a larger size at the coil and condenser... is that OK?