Upon arrival found the flue pipe to be paper thin and falling apart. Repair was quoted out at $285. The homeowner approved of the repair for $285. Removed section of old flue and installed new flue pipe in its place. After repairing flu pipe, an oil maintenance was performed. Brushed and vacuumed soot and debris from the heat exchanger. Checked electrical connections and safeties. Performed a combustion test on unit, unit is running at 5.4% O2, 20ppm CO, with zero smoke. 30 dollar discount was added for heating maintenance.