During today’s visit, performed inspection and maintenance on one attic furnace unit for the main floor. The filter did not need to be changed at this time. Inspected flue pipe and ductwork for leaks. Found major supply leak at the back of the supply Plenum, where an 8” elbow has partially ripped away from the plenum. Sending estimate to customer to repair the supply leak. Inspected burner and blower compartments for overall cleanliness. Inspected pressure switch, igniter, flame sensor, and burners. performed ignition sequence on the unit and inspected flames. Inspected blower and inducer amp draws. Inspected temperature heat rise, which is in the ideal range. The system is operating normally at this time, however, the supplyleak will need to be fixed. Photos attached.