Burnham Unstable Flame or Draft on Oil Burner

Boiler cycles on and off rapidly on oil primary control without locking out

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Improper draft in chimney, Blocked flue passages, Incorrect air shutter setting, Loose burner mounting causing air leaks

Safety first: Turn off power and oil supply before opening burner or flue connections.

Inspect chimney and barometric damper: Ensure the damper swings freely and the chimney is not blocked.
Check burner mounting: Tighten burner flange bolts to ensure a good seal to the combustion chamber.
Clean boiler flue passages: Soot buildup can disrupt draft. A technician should brush and vacuum the flueways.
Professional draft and combustion test: Have a burner technician set draft and air settings using proper instruments.

Professional Required 5/5

Oil Burner Assembly

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