Came out today for 1 system maintenance on gas upflow Lennox system. System is located in garage in closet. Started by turning heating on at tstat to verify proper heating sequence. Then tested all heating elements and safeties on unit. All components are operating as designed, blower wheel is clean at this time. Customer changes filter 16x25x1 every month filter is still clean. No blowout kit on drain line recommend adding to test resistance in lines. Checked all electrical components on outside unit and condition of coil all electrical components are within manufacture specifications. Do recommend adding hard start kit to help with start up of unit to increase efficiency and longevity of compressor. System is operating properly at this time. Thank you for your time. Customer approved compressor savor.