Immergas
Intermittent Flue / Combustion Disturbance
Boiler locks out intermittently, especially in windy conditions, with no consistent error 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
Wind affecting flue terminal, Incorrect flue terminal type or position, Partial blockage in flue, Fan speed instability
How to Fix / Troubleshooting
Safety: Flue issues can lead to unsafe operation. A qualified engineer should assess the installation.
- Observe conditions: Note whether lockouts coincide with strong winds or specific wind directions.
- Check terminal location: Ensure the flue terminal meets Immergas and local clearance requirements from corners, windows, and other structures.
- Inspect flue internally (engineer): Check for partial blockages, incorrect joints, or sections not properly supported.
- Terminal change: In exposed locations, an alternative terminal type or flue configuration may be required to reduce wind effects.
- Fan check: Verify that the fan maintains stable speed; replace if intermittent.
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Repair Difficulty
Professional Required
5/5
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