Junkers
Wind-Induced Flue Disturbance
Furnace frequently locks out during windy conditions, sometimes with flue-related codes
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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, Damaged flue terminal on Junkers concentric system, Negative pressure in boiler room, Inadequate flue support
How to Fix / Troubleshooting
Safety first: Do not modify the flue yourself beyond basic visual checks.
- 1. Inspect terminal: Check that the flue terminal is intact, correctly oriented, and not shielded or obstructed by structures.
- 2. Room ventilation: Ensure the boiler room has adequate ventilation and that extractor fans are not creating strong negative pressure.
- 3. Professional flue assessment: A heating engineer should assess flue routing and terminal position against Junkers installation guidelines and local codes. Relocation or modification may be required.
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Repair Difficulty
Hard
4/5
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