Performed pm on oil boiler 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 While performing the maintenance we found 2 fittings for the hot water coil that are actively leaking and also saw the mixing valve at the coil is leaking. Brought the customer down and showed them the corrosion. Will work up a quote for fittings and mixing valve and a quote for a electric water heater