Boiler was not operating upon arrival. After further diagnostics I found that the flow sensor has failed according to the manufacture. Part is 3-4 weeks out, customer would like to move forward with the repairs. I will have the office reach out and schedule a time we can return to make these repairs. As of now I am not sure that this is he only issue going on with the boiler, I would advise looking into replacing the system to avoid any further high costing or long waiting repairs.