What does the Glow-worm Energy F85 fault code mean?
The F85 fault code on the Glow-worm Energy boiler indicates a problem with the domestic hot water (DHW) condensate system. This typically means that the condensate is not being properly drained, which can lead to operational issues with the boiler.
Common Causes
- Blocked Condensate Pipe: A blockage in the condensate pipe can prevent the proper drainage of water, causing the fault code to appear.
- Frozen Condensate Pipe: In colder weather, the condensate pipe may freeze, leading to a blockage and triggering the F85 fault code.
Can I fix it myself? (DIY)
If you suspect a blockage or freezing, you can attempt to clear the condensate pipe by thawing it with warm (not boiling) water or checking for obstructions. However, for any gas or electrical issues, it is crucial to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F85 fault could range from £100 to £200, depending on whether the issue is a simple blockage or requires more extensive work to replace the condensate pipe.