Completed tune up on system. Flipped filter around to correct way. Checked all electrical connections and components on the indoor and outdoor system. Checked drain line and verified proper drainage. Also fixed attic fan so it could pull the heat out if the attic. Found biological growth in duct work and informed homeowner about it. Washed outdoor unit and took pressures. Gave customers different options on the way we can attack this problem. Recommended option 1 with a level 2 cleaning and iaq 300 and a surge protector for outdoor system to help prevent possible board failure due to power surges.