1 Gas Hot Water Boiler: Well McLean 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 ignition Assembly-ok thermocouple in good condition. 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; Performance-ok Check and run Thermostats- operating well at this time. Check zoning operation-isolate and run zoning. Check circulation pump-ok amps and voltage check. Check water feeder, low water cut off, vent damper, relief valve and expansion tank. Check for water leak no leakage at this moment. Run and monitored for good operations. All zones are fine supply and return lines getting hot. Perform check for 50gal HWH. Check for water leak, no leakage at this time. Check control gas valve-ok Check air Combustion and Dr