Responded to leaking boiler issue previously diagnosed by technician. Identified pinhole leak in expansion tank spraying water and a faulty relief valve on hot water holding tank. Observed severe corrosion throughout system, particularly on control board and multiple fittings. System operational despite deteriorated condition. Discussed replacement options with homeowner, who requested both immediate repair of expansion tank and relief valve plus consultation regarding potential full boiler replacement. Scheduled follow-up with service advisor for replacement quote.
