Today we came out for main level heat pump system system not heating Goodman 3 ton air handler with 2 ton Goodman heat pump 14 seer found blown low voltage fuse. Inspected all wiring found wires going into air handler rubbing housing, burn marks on defrost board and pitted contactor. Inspected addition found hole in drain pan, minimal flood protections and service valve caps missing. Line set is way to long damaging compressor and shortening life expectancy. Repaired wires and left quote for new contactor and defrost board. Cycled equipment multiple times and left IAQ options. Left all equipment operational.