Performed first year furnace cleaning; inspected the exhaust and intake PVC ensuring all connections were secured, removed and cleaned the burners along with the flame sensor, cycled the system on and checked gas pressures and did make an adjustment to 1st stage, as well as performed a combustion test verifying no CO in the airstream, and lastly replaced the 16x25x1 filter. Due to the amount of dust build up on the blower wheel I highly recommend upgrading to an electronic air cleaner this will bring these levels of dust down in the home. This system is currently operating normal and heating at 51 degrees at this time. Job complete