To replace the igniter and the flame sensor and the neutralizer rocks removedThe igniter and the flame sensor Install new flame sensor and installed new igniter with igniter harness removed condensate trap discarded old neutralizer rocks cleaned condensate trap and installed new Neutralizer rocks turn system on and checked operations left system functional View visual findings from this job here - https://visionshare.xoi.io/?id=XA-A243-5A5A0FA8C6FF4DF38B9AE4F06B337D31