Based on our findings today, it might be time to think about getting a brand new system. Perform diagnostic on 13yr old Lennox unit in very bad shape, upon arrival customer stated unit wasn’t cooling properly, stated not keeping up, checked stat, cycled temp down to 68, unit started up, customer showed me equipment, also stated he took screws out to water clean coil, inspected furnace in crawlspace, noticed unit is sitting on the ground, supply and return plenum is falling apart, recommend replacing both plenums, some duct work is in bad shape needs replaced, or rewrapped with insulation, filter recently replaced by customer, blower wheel impacted and leaking oil, recommend cleaning blower wheel, explained to customer cleaning can cause motor to go ahead and fail, evap coil slightly rusted, flu vent rusted , recommend replacing flu vent, drain line is incorrect size, recommend running new drain line, condenser coil still impacted, recommended chemical cleaning, condenser capacitor read