ATAG Flue Terminal Wind Effect / Combustion Instability

Furnace shuts down when wind is strong, sometimes with no stored code

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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

Incorrect flue terminal location, Inadequate flue support, Wind blowing directly into terminal causing pressure fluctuations

How to Fix / Troubleshooting

Safety first: Do not modify the flue yourself; incorrect work can be dangerous.

  • Observe whether shutdowns coincide with strong winds or specific wind directions.
  • Inspect the flue terminal for damage or missing wind baffle components.
  • Report the issue to an ATAG-qualified installer; they may need to fit a different terminal type, adjust flue length, or relocate the terminal to a more sheltered position.
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Repair Difficulty

Professional Required 5/5

Required Part

ATAG flue terminal kit
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