Preformed summer tune up on carrier heat pump, system for the most part in good condition but there was some things the homeowner and I spoke about. The contractor is burned and worn and should be replaced, the armorflex is gone from suction line, and a condensation safety switch should be installed. When I went in the attic and took the panel off unit it was overflowing with water because the drain line was backed up. Homeowner just wanted to clear it for now. It was obvious it’s been going on a long time from rust to the insulation being saturated and discolored. There’s a good chance the blower has been pulling moisture in so we will need to monitor it at future tune ups. Also changed filters out and noticed the return grill doesn’t latch without tape. This is dangerous and can be fixed. Unit running at departure with a 21 degree TD. Also cleaned outdoor coil