Came out to service HVAC system, tested heater and AC, found the filter extremely dirty due to the return duct falling off the plenum and not duct seal. Check burners and all electrical components in the furnace, cleaned out the drain line. Turn system over to AC, outdoor condenser coil was extremely dirty and I washed it very thoroughly, system had a soft start kit. Checked capacitor and all electrical components and check refrigerant. Tested unit operations system works fine at this time. Homeowner approved duct sealing the whole house. I then reconnected the duct to the return plenum, duct sealed all connections in the attic on all plenums, coil, and air boxes. I then grill sealed all supply air vents in the house. H/O payed $500 and the remaining balance is financed.