1 Gas Hot Water Boiler: Well McLean Steam 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 pilot assembly. Thermocouple replaced last year, customer did not want to move forward with thermocouple replacement @ time of maintenance. 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 automatic water feeder, automatic low water cut off, and vent damper. Check for water leak no leakage at this moment. Run and monitored for good operation. 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 Draft-ok Run and monitored for good