Hot Water Boiler. HWH tank. Perform a tune-up and cleaning to help ensure reliable and safe operation. Inspect for cracks & deterioration of Heat Exchanger. Check and clean Burners, brush and vacuumed-ok Check and clean pilot Assembly-ok Check thermocouple- replaced in this visit. Check Safety Controls-ok Check electrical wiring and components-ok Check water feeder-ok Check back flow prevent-ok Check expansion tank-ok Check relive valve-ok Check Gas valve & Gas Line-ok Check Combustion Air, Flue pipe-ok Check Temperatures & Water pressure settings; Performance-ok Check and run Thermostats- okay Check circulation pumps-ok Perform inspection on a HWH tank. Check for water leak, no leakage at this moment. Check water valves-okay Check gas valves-okay Check gas line-okay Check ST-12 exp- good Check flue pipe-okay Run and monitored for good operation-ok Run system, check radiators, all of them getting hot, left system operating well at this moment.. /-/-/-/-/-/- - Richard completed the re