Furnace start up. Cycled system. Checked and tightened electrical connections and clamps. Found clamp incorrectly placed. Removed and installed correctly. Checked incoming and outgoing gas pressures. Checked and adjust d gas pressures to maximize efficiency efficiency. Checked venting. Temp rise normal. Preformed combustion test and found normal levels in exhaust. No CO found in airstream. System operating normal at this time. Job complete.