My house is just over 2.5 years old and the AC has worked beautifully for 2.25 years. In May I noticed that the system seemed to struggle to get the temp down below 78 - 79 and runs constantly until about sundown. I called out the original installers, who determined that the evaporator coil was leaking and it would have to be replaced. I'll leave out the unnecessary details regarding the nearly two weeks of multiple problems in getting the coil installed, (cracking drain pan, replacing expansion valve, shorting out the thermostat, etc..) After all this, the system seems to be doing the same thing it originally was before I called them, running constantly until around 8:30 - 9:00 PM. I have the system set for 77 throughout the day and drop down to 75 after 3:30.
Heat Pump with Puron R410A
Bryant Model: 633AJX048000AAAA ( I believe 4 ton, 12 SEER )
The house is 2150 sqft with 10 - 12 ft ceilings throughout.
I would think with a 4 ton unit running properly, there should be no reason it can't get the house down to 72 - 73 if we wanted.
Does anyone have any ideas?