Worcester
Condensate / Flue Joint Leakage
Boiler flue terminal drips water or white staining appears on the wall below the flue.
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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
Poorly sealed Worcester flue joints, incorrect flue fall causing condensate pooling, cracked flue elbow, blocked condensate path
How to Fix / Troubleshooting
Safety first: Flue gases are hazardous. Do not dismantle the flue yourself.
Homeowner checks:
- Observe the flue terminal while the boiler runs; light dripping of clear condensate from a condensing boiler can be normal, but heavy dripping or staining is not.
- Check that the condensate pipe is intact and not leaking.
Engineer actions:
- Inspect all Worcester flue joints for correct assembly and sealing.
- Check flue gradient to ensure condensate flows back to the boiler.
- Replace any damaged flue sections or seals.
- Verify condensate trap and pipework are clear.
Flue integrity is a critical safety issue and must be corrected by a Gas Safe engineer.
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Repair Difficulty
Professional Required
5/5
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