Preform maintenance on dunkirk single zone gas water boiler: * shut power to system at arrival * removed boiler cover door * Removed hot surface igniter and inspected- showing signs of ware * brushed and cleaned condensate trap on boiler and flushed with fresh water * tested system condensate pump and discharge line and cleaned * disconnected fresh air intake and confirm clean and clear with no debris- reconnected and secured * test and check system expansion tank (60), air vent, water feed and back flow and relief valve- okay * confirm boiler pressure is normal * secured and inspected all electrical wiring, components and connections * inspected flue and fresh air intake venting * vacuumed and dusted out inside boiler cabinet and components, boiler jacket and piping clean and clear * return power to boiler * call for heating on Honeywell T4- thermostat- system goes through normal sequence of operations and fires properly * monitor system operations, inspected flames, boiler pressure