These guys are awesome!
Background: They installed the AC unit in my house for the previous owner.
They let me know about a 10 year warranty that I had forgotten about!!!
Today's experience: Tech showed up exactly on time at the start of a 2 hr window. He identified and explained everything that is going wrong. He also found some issues which I wasn't aware of. Additionally, he made some excellent recommendations for preventative maintenance (unit is 9.5 yrs old) in order to extend the unit's life as much as possible.
Very reasonably priced. I highly recommend AHR.