What does the Glow-worm Energy F25 fault code mean?
The F25 fault code on a Glow-worm Energy boiler indicates an ignition failure, meaning the boiler is unable to ignite the gas to start the heating process. This can lead to a lack of hot water and heating in your home.
Common Causes
- Blocked Flue: A blockage in the flue can prevent the safe expulsion of gases, leading to ignition issues.
- Faulty Ignition Electrode: If the ignition electrode is damaged or dirty, it may not create a spark to ignite the gas.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any issues related to gas or electrical components. Attempting to fix these problems yourself can be dangerous and is not advised.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F25 fault could range from £150 to £300, depending on whether the ignition electrode needs cleaning or replacement, or if a flue blockage needs to be cleared.