2016 Trane heat pump on roof and air handler in mechanical closet working properly with no refrigerant issues at this time. I did recommend flushing the drains(since spring is approaching), installing a 20x20x1 filter, a 1 system tune up and adding surge protection for the heat pump on roof. Customer decided with the GOOD option with flushing the drains and installing the 20x20x1 filter. Pics uploaded