Repaired ductless mini-split AC system. Diagnosed refrigerant leak in Mitsubishi MSZ-FH12NA indoor unit. Located leak at flare connection, tightened fitting, and recharged system with R-410A. Cleaned air filters and evaporator coil using Nu-Calgon Evap Foam. Tested system operation, confirming proper cooling and dehumidification. Advised owner on regular maintenance schedule.
