Cleaned and serviced one oil fired boiler, brushed and vacuumed combustion chamber and flu piping, wiped down boiler of dust, changed filter nozzle and strainer, cleaned electrodes, cleaned burner head, bled oil line, performed combustion and efficiency test which everything looked normal, inspected all water components no signs of leaks, drained a little water out of indirect tank which was clear no sediment in tank, system operational and working.