Did 1 system diagnostic. System wasn’t operating when arrived. Improper high voltage and low voltage.insufficient supply and return ductwork. No Te flood protection. No heat strips. Fuse blown on air handler. Plenum isn’t properly sealed. Restricted ductwork. No disconnect for air handler. Will need electrical team to inspect and label sub panel. Due to cost of repair customer would like replacement quote to make sure everything is done properly. Based on our findings today, it might be time to think about getting a brand new system.