Completed 1 system furnace repair and preventative maintenance check. Find upstairs Goodman furnace 5 year old operating with in manufacturer spec. Find system have no water protection and drain pan damage. Find evaporator coil not level. Find furnace gas line not up to code. Find system missing return plenum and missing filter rack for filter. Give customer estimate to repair system. Find downstairs furnace 5 year old operating with in manufacturer spec. Find flue pipe not up to code, missing drain pan and water protection. Missing return box and filter rack. Give estimate to repair system. Both furnace operating at this time. Change filter for customer. Suggest Comfort Club membership plan and suggest duct cleaning. Suggest to capacitor off bathroom return vent.