Performed furnace start up; started by inspecting the exhaust and intake PVC ensuring all connections were secured, I then did a leak search on the gas line, next I cycled the system on and checked gas pressures did adjust gas pressure down to 3.5Inwc, also performed a combustion test verifying no CO in the airstream. Customer stated he did not like the program feature on the Tstat so I removed this option. This system is currently operating normal at this time. Job complete