Replace Oil Burner Filter
Why it matters
Clogged oil filters reduce fuel flow, causing burner lockout mid-winter without heat. A new filter costs $15–30; emergency service calls cost $300–500+. Annual replacement is essential preventive maintenance.
Stop forgetting to do this.
Hearth generates a personalized maintenance schedule so you never miss another replace oil burner filter.
How to do it
- 1
Locate the oil burner filter can (usually beneath or beside the boiler/furnace in the basement).
- 2
Turn off the oil burner at the switch (usually on the burner itself or nearby wall switch).
- 3
Close the manual shutoff valve on the oil supply line (before the filter).
- 4
Place a bucket under the filter can and unscrew the can using an oil filter wrench; carefully set it aside.
- 5
Drain old oil into the bucket; note the filter element size (typically 2-micron or 10-micron cartridge).
- 6
Purchase a replacement filter of identical size; install in the can, refill with fresh oil, screw can back on, and open the supply valve.
- 7
Turn the burner back on and listen for ignition; flame should start within 10–30 seconds.