Can maintenance be done on an oil furnace? : r/hvacadvice - Reddit
Key aspects of oil maintenance include replacing the nozzle, changing the oil canister filter, and checking and adjusting electrode positioning.

Oil Furnace Maintenance Advice | American Standard
Oil furnace upkeep tips - Make sure to turn off the system. To ensure safety, always disconnect both the fuel source and electrical supply before beginning any inspection.

Oil Furnace Cleaning Tools and Services - Carrier
For optimal operation and efficiency, it's advisable to schedule annual maintenance for your oil furnace with a qualified HVAC professional. Dirt and carbon soot can accumulate...