Complete 2 heating maintenance in Atlanta. Find upstairs Lennox 7 year old furnace operating with worn flame sensor and not calibrated. Complete combustion calibration service, replace flame sensor and change filter. System operating with in manufacturer spec. Find downstairs duel fuel system 15 year old Amana. Find heatpump system low on charge and leaking at evaporator coil. Find coil baldy rusted and air distribution plenum molded. Find heatpump operating with worn contactor and stress compressor. Find furnace blower assembly dirty, flame sensor getting weak and rusted burner. Due to system age and conditions, customer need consultation visit.