Replacement warranty Upon arrival house temperature was at Setpoint (71⁰) Connected diagnostic probes to ductwork and AC unit Readings were nominal. Only abnormality was subcooling was 13⁰ and the specification is 8⁰ Condenser coil had a small amount of pollen buildup, washed coil with water. Allowed 15min run time to stabilize again. Removed refrigerant until 8⁰ subcool was achieved Allowed another 15min run time to be sure numbers stayed stable. Both renters complained upstairs is hotter than downstairs Explained basement is finished, access to ductwork is impossible without drywall removal Advised making sure furniture is not on top of supply registers or in front of return grills is imperative Also advised choking down supply registers on first floor can possibly help making the upstairs more comfortable Unsure if they adjust the cooling Setpoint a lot, explained picking a Temperature and leaving it there is best for allowing the system to keep the house cool on hot days. If they