To replace the flame sensor/igniter Remove Dunkirk pilot assembly, which was compromised due to age installed new Dunkirk pilot assembly turned systems on and checked operations also check natural gas fittings and for carbon monoxide leakage none detected left system working View visual findings from this job here - https://visionshare.xoi.io/?id=XA-90AE-4A1415B064194FB5BF87C24D66472018