Checked one sage 2 boiler which supplies heat and domestic hot water by a indirect storage tank diagnosed the flame sensor and the igniter was corroded cleaned them to get the boiler running and highly recommend to replace the igniter and the flame sensor and the neutralizer rocks system is working at this time Boiler model # K2-150 please see photos for details office personnel please contact homeowner with a quote for the repairs View visual findings from this job here - https://visionshare.xoi.io/?id=XA-213F-7D6314680DCC4B828DC3CDFE4D23CC3B