i have a new goodman 3.5 ton split system installed. its a year old and the installer says it has a 5 ton evap. coil. this is a heatpump and i went through the power company and had all new duct work install and manual j done. its freaking hot even on cool days and the thing runs all the time it seems. i understand that its a good thing for it to run but the house starts heating up mid morning and continues until late at night before it cools off. the company man has rerun the manual j and checked the load and says its ok. he said it was my old windows and doors. ok i know they needed replacing so i did that. its still hot............... the power company sent thier man to run a manual j and check the load on the unit..........guess who shows up too........ the installer. anyway the power company comes up with the same figures, the unit has a variable speed fan motor and i was running it in the on position. he says to put it on auto that that may be the problem.............well guess what its still hot...............help any ideas on what i should do now. i have been thinking of calling another company and pay them to do another manual j but thought they may just want to sale me another unit what would be my best route to go thanks in advance guys your all great.............