Customer complaint: air-conditioner not keeping up with set temperature of 73. Checked AC operation. Compressor: 9.2A . Condenser fan: 0.82A . Blower: 5.8A, 1100cfm . ambient: 91 . liquid line: 96 . suction line: 56 . metering device: TXV . Suction pressure:124(43) . Return air: 72.5 . supply air: 52.0. wet bulb: 60 . Unit is cooling properly. Checked filter: True Blue. Room addition has attic air entering from leaky canned lights! Room addition has portable air conditioner. I found warm humid air infiltrating into basement from under room addition slab. Basement pressure is slightly negative (- .005 inches water column) with basement door closed, causing additional air infiltration into basement and downdraft of flu vent. Work suggested: recommend 3M brand air filters. Seal air leaks into attic at recessed lighting in room addition. Have insulation in attic checked. Remove basement door or Block basement door from closing all the way to keep pressures