Performed a heating pm on an oil boiler. Brushed and vacuumed. Replaced the oil filter, nozzle and strainer. Started and checked the safeties. Performed a combustion test. 7.1%o2, 0ppm, 0 smoke, 81.6% efficient System is operating properly. Removed burner motor and cleaned the blower wheel. There was some cat hair in the wheel. Recommend vacuuming around the area due to fur was on the pipes and on the burner. Don’t want to have issues in the future.