1 Gas Hot Water Boiler: Crown Boiler- Perform a tune-up and cleaning to help ensure reliable and safe operation. Inspect for cracks & deterioration of Heat Exchanger Check and clean Burners tubes and heat exchanger- ok, vacuumed-ok Check and clean flame sensor/flame rod and ignition Assembly-ok Spark igniter. Check Safety Controls-ok Check electrical wiring and components-ok Check Gas valve & Gas Line-ok Check Combustion Air & Exhaust-ok Check Temperatures & Water pressure settings; 18psi Performance-ok Check and run Thermostats- operating well at this time. Check zoning operation-isolate and run zoning. Check Honeywell zone valves. Check Triple Aquastat Check water feeder, relief valve, Vent damper and expansion tank. Check for water leak no leakage at this moment. Ran and monitored for good operations. All zones are fine supply and return lines getting hot. Check water circulation on Radiators getting hot left system operating well at this time. No Issues present or signs of failure