Technician arrived to customers home. Technician greeted customer and asked questions about their home. Technician then started in attic on air handler. Technician checked electrical readings they where in good condition, aswell as blower heat strips. Technician checked filter and changed it. Technician then went to outside condenser unit. Technician checked electrical readings and all where in range aswell as refrigerant readings. Technician then started washing condenser unit and waxed it. Technician then wrote recommendations. Technician talked to customer about drain having a bit of sludge, she said she was going to hold on that for now.