Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 9%o2 18ppm co 0 smoke Upon arrival when watching the furnace start up we noticed the burner motor sounded worse than last year and is getting close to failing. After getting customer authorization we replaced the burner motor. Started and tested the new motor. Unit is working properly. Replaced air filters