Customer call us out for an inspection. During visit found ducting chewed through by rodents. Found blower constantly running even when in auto and off. Found corrosion on control board. Blower is dirty. Heat strips not coming on. Found water build up in crawl space due to sump pump not running. System is low on refrigerant. Low volt wires need to be rerun into air handler. Overall the system is not in good condition. Home has been vacant for over a year. We recommend replacing the control board with wire harness, cleaning the blower, repair low volt wire, replace heat strip kit, leak search, and ducts with holes in them. Also recommend condensation pump conversion, While in crawl noticed code violations with high voltage wires wire nutted with no junction box and found no disconnect at the air handler or heat pump.