Arrived to do a maintenance on a fridgedaire PKG unit that’s fourteen years old. I cleaned the coils with water and cleaner. I checked the electrical system. I checked the filter, 20x20x1 owner has there own filters. I do recommend a comfort advisor to come out and give you an estimate on a new PKG unit. The unit you have is costing you more money a month to operate Than a new unit would every month. Also the insulation in the attic is below recommended levels.