Tested system, not cooling for the whole home. Found this system freezing up and tested refrigerant levels. The refrigerant levels were fluctuating and going into freezing territory. Found that the evaporator coil had a thick layer of dust/dirt and the blower wheel was also very dirty. Condenser coil also dirty and today we cleaned all three of these components. The unit being dirty was causing the pressures to be low because of a restriction of airflow and not enough air going across the coil. We also installed a UV light inside the system to help prevent growth. Install locking caps on the outdoor unit and replace the lineset insulation. We also installed an in-line float switch along with a wet switch in the pan. After all the repairs were done, we tested the system thoroughly and there are no mechanical Failures at this time.