Performed pm on oil furnace 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 7.0%o2 1ppm co 1 smoke While performing the maintenance we found the chimney had a very high level of soot and debris. When taking apart the flue pipe we found the buildup had started to partially obstruct the flue pipe opening. Cleaned the buildup and brought the customer down to show them. Recommend having a chimney person clean the chimney. Also found the water heater is from either 2010 or 2012. Electric water heaters are typically replaced after 10-12 years. Recommend replacing the water heater before any leaks happen. 50 gallon electric. Greg’s chimney 203 630 1976