View visual findings from this job here - https://visionshare.xoi.io/?id=XA-90AE-5EBDC2688DFE4A6D85D606062446A13D Customer has no heat and no hot water: The boiler is giving an error message that the flow switch is not closing- The customer states that he replaced the flow switch yesterday so it should be working fine. At arrival, the boiler is off at the switch Turn power onto the boiler and you can immediately hear that the heat exchanger is air bound, and water is not circulating. The boiler goes into a soft lockout for flow switch. Record all findings. Purge air out of heating system at return valves for both heating and DHW loops but the boilers heat exchanger still has air inside and not closing flow switch. Manually feed water into the boilers heat exchanger while Simultaneously purging out of the relief valve to remove all of the air from the heating system while the zones are isolated- loads of air coming out of boiler system Open all valves back to boiler and test sy