Performed furnace clean and tune; 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 and did make an adjustment to low stage, then I performed a combustion test verifying no CO in the airstream as well as replaced 213 air filter and #35 water panel. This system is currently operating normal at this time. Job complete