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 was recently replaced, still in good condition. Shut power to gas valve to clean burners. Thermocouple relight on 1st try after cleaning. 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; 15psi Performance-ok Check and run Thermostats- operating well at this time. 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, n