Performed furnace start up; inspected the exhaust and intake PVC ensuring all connections were secured, sniffed the gas line for possible leaks, cycled the system on and checked gas pressures and did make adjustments on both stages, as well as performed a combustion test verifying no CO in the airstream. I did a refrigerant leak search on the systems evaporator coil and found an indication of a leak. I highly recommend having the AC cleaned this spring to ensure operations and to prevent any issues with the new furnace. Humidifier was unplugged because it leaks during operation I am including a quote for a replacement humidifier. Everything is operating normal at this time. Job complete second opinion scheduled with Dan F Monday 03/25/19 at noon