What does the Glow-worm Energy F86 fault code mean?
The F86 fault code on the Glow-worm Energy boiler indicates a condensate fault, typically related to the condensate pipe being blocked or frozen. This prevents the proper drainage of condensate water, leading to operational issues.
Common Causes
- Blocked Condensate Pipe: Debris or sludge can accumulate in the condensate pipe, obstructing the flow of water.
- Frozen Condensate Pipe: In cold weather, the condensate pipe may freeze, causing a blockage that prevents drainage.
Can I fix it myself? (DIY)
If you suspect a blockage, you can attempt to clear the condensate pipe by thawing it with warm (not boiling) water or checking for debris. However, if the issue persists or involves gas or electrical components, it is essential to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving a F86 fault typically ranges around £100 to £150, primarily for clearing a blocked or frozen condensate pipe. This cost reflects the labour and any materials needed for the repair.