Performed cooling maintenance on a Trane two stage heat pump Filter is clean Blower is clean Drain is clear Wiring is secure and no signs of overheating Outdoor coil is clean Capacitor tested in specification Wiring is secure and no signs of overheating A mouse showed itself while testing the unit. Thankfully, there isn't any chew marks on the wiring yet. Recommend pest control to get rid of them. Refrigerant charge is in specification Complaints of noise from the heat pump since day 1 Interested in Daikin heat pump and possibly switching to a dual fuel system since there is propane.