Completed an AC maintenance on a 19 year old Trane XB 12. Indoor issues only drain is really dirty. Advised customer to pour vinegar down drain every couple months to keep clean. 20 degree split. Outdoor issues only Armaflex needed. Suction line temp 65 degrees. Customer complained of daughter’s room being a hot spot. Left an estimate for adding return. Also advised customer that system has reached its life expectancy and considering replacement is better sooner than later. System is cooling properly.