ROL
Laars Flame Rollout Safety Trip

Boiler displays ROL or Rollout; burner shuts down and may require manual reset of rollout switch.

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Safety Warning

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.

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Possible Causes

Blocked heat exchanger or flue passages, Blocked exhaust vent, Cracked or misaligned burner, Failed or tripped rollout switch

How to Fix / Troubleshooting

Safety first: Flame rollout means flames or hot gases are leaving the combustion chamber. Turn off power and gas immediately. Do not reset the rollout switch until the cause is found.

  • Inspect around burner: Look for signs of scorching, melted wiring, or soot around the burner compartment of the Laars boiler.
  • Check venting: Ensure the flue pipe is intact, properly connected, and not blocked. Do not operate the boiler with any venting removed.
  • Locate rollout switch: The rollout switch is usually a small disc-type device near the burner. If it has a manual reset button, do not reset until a technician has inspected the boiler.

When to call a professional: Any rollout event is serious. A qualified technician must inspect the heat exchanger, burners, and venting before the boiler is returned to service.

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Repair Difficulty

Professional Required 5/5

Required Part

Flame Rollout Switch
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