Performed diagnostic on 9yr old Goodman ac unit with a 26 yr old trane furnace, upon arrival tenant stated he was taking care of payment, stated unit stopped working two days ago , checked tstat, cycled to ac mode, nothing came on, inspected furnace, found in closet in very bad shape, found rusty flu vent also noticed wasn’t connected, explained not safe to run, recommend replacing flu vent, blower wheel heavily impacted, recommend pulling and cleaning, explained motor can still fail after cleaning, blower capacitor reading below specs, recommend replacing blower capacitor, duct work is in bad shape as well, recommend new supply plenum and running new duct work, return plenum in poor shape as well, found no voltage goin to control board, added fuse popper and unit started up, inspected outdoor unit, found condenser coil impacted, recommend chemical cleaning, found contactor burned and pitted, recommend replacing contactor, condenser capacitor reading below specs, recommend replacing