All wiring is tight and in good condition. I cleaned the flame sensor. The heat exchanger is in good condition. I completed a complimentary refrigerant leak search on the system. No leaks found at this time. The ductwork is dirty. When I was inspecting the furnace I noticed a little bit of water under the water heater. The relief valve is working properly and is dry. I found water inside of the heater behind the outer casing. The holding tank has a small leak. I prepared a quote for replacement after speaking to the customer and showing them the issue.