Saunier Duval
Flue gas or steam leakage
Water heater causes condensation or damp patches on nearby walls or ceiling
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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
Leaking flue joints, Incorrect flue termination, Missing or damaged flue seals, Cracked flue elbow or adapter
How to Fix / Troubleshooting
Safety first: Turn off the heater and do not use it until the flue system has been checked. Risk of carbon monoxide.
Steps:
- Inspect flue path: Follow the Saunier Duval flue from the appliance to the terminal, checking for gaps, loose joints, or staining.
- Check seals: Replace any perished or damaged rubber seals in the flue joints.
- Verify installation: Ensure the flue length, number of bends, and terminal position comply with the installation manual.
- Professional test: Have a technician perform a flue integrity and combustion test.
Warning: Do not attempt to seal flue joints with non-approved materials like tape or silicone alone.
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Repair Difficulty
Professional Required
5/5
Required Part
Concentric Flue Kit
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