Inspected upstairs system. Found rust inside furnace and heat exchanger. System is currently operating. From 2007. No inline flood protection and damaged drain pain. Blower is dirty. Filter is old and fragile. Evap coil is very rusted as well. Outdoor unit coil is very dirty. Cap is bad and also contactor. Cleared drain lines on both units. Tested heat as well system does have some bouncing flames but found no cracks or holes in heat exchanger. System is operating on departure. Emailed over pictures and estimates.