Performed first year furnace furnace cleaning; inspected the exhaust and intake PVC ensuring all connections were secured, I then removed and cleaned the burners along with the flame sensor, next I cycled the system on and checked gas pressures, then dean a combustion test verifying no CO in the airstream, as well as replaced the 16x25x1 filter. This system is currently operating normal and heating at 57 degrees at this time. Job complete