Completed cooling tune ups for 3 systems, 2 of 3 looked good. The master bedroom system looked a little low on refrigerant, checked for leaks & everything looked good, I mentioned to the customer it could be when they installed that system they never charged it up correctly due to having long line sets. She said she would schedule next years tune up when it’s warmer so we could accurately check pressures to see if that was the case. No other issues to report.