Performed pm on oil water heater Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 11%o2 0ppm co 0 smoke While performing the maintenance we found multiple birds inside the water heater. Need to have a chimney person come and inspect the chimney. Greg’s chimney 203 630 1976