Preformed tune up on gas split system, homeowner said that last tech didn’t do half of the things we should had done on the last visit such a clean the outdoor coil and wanted everything looked at again. We went through everything from the condenser such as amp draws, capacitors, and checking refrigerant as well as cleaning coil. Also did the heating tune up on the furnace. Everything is in good condition, I left an estimate for a maintenance agreement and left an estimate for replacing a duct run at the homeowners request. Unit running at departure. Recommend insulating scuttle hole. Advised him not to use current filters as they are restrictive. Go a little cheaper or buy media.