I am trying to help my parents and fix there a/c which has been down most of the summer after buying a new unit (upstairs) and old unit serviced (downstairs) and having both jobs done improperly. I assumed all was well since he was there a couple of months ago but after visiting I find out it is anywhere from 85 or higher day to 78 at night. They of course believe the nice man will be back to fix. He will not.
So I decide to take my limited skill set to it and see what I can do. Anyway the downstairs unit had a bad capacitor that must have ran constantly with it bad for 2 moths or so fan was spinning but not at proper speed. Long story short after changing the capacitor the air comes out of vents@ 59-60 degrees cools house now I am back a few days later to check the upstairs unit that was improperly installed (leaky evap line since day one I am sure)and discover the downstairs is only blowing 70-71 degrees out. Is the fan motor bad or is the unit just not cooling properly because it never kicks off because it is over compensating for the upstairs unit previously mentioned?
Any and all advise or personal experiences would be greatly appreciated.