Rollout Switch Open
Weil-McLain Flame Rollout Safety Trip

Boiler shuts down and indicates 'Rollout', 'Flame Rollout Switch Open', or similar; manual reset required.

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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, cracked heat exchanger, improper combustion, burner misalignment

How to Fix / Troubleshooting

Critical safety warning: A tripped rollout switch indicates flames or hot gases leaving the combustion chamber. This is a serious hazard. Do not repeatedly reset without finding the cause.

  • 1. Turn off gas and power: Immediately shut off the gas valve and electrical power to the boiler.
  • 2. Inspect burner area: Look for signs of scorching, melted wiring, or soot around the burner opening and jacket. Do not operate the boiler if damage is present.
  • 3. Check vent and flue: Ensure the chimney or vent connector is not blocked or collapsed.
  • 4. Do not bypass switch: Never jumper or bypass the rollout switch.

This condition requires a qualified technician to inspect the heat exchanger, burner, and venting. The rollout switch itself may be replaced, but only after the root cause is corrected.

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Repair Difficulty

Professional Required 5/5

Required Part

Flame Rollout Switch
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