What does the Glow-worm Ultimate F26 fault code mean?
The F26 fault code on the Glow-worm Ultimate indicates a fan fault, which typically means that the fan is not operating correctly or is not detected by the boiler’s control system. This issue can prevent the boiler from functioning properly, leading to heating and hot water failures.
Common Causes
- Faulty Fan: The fan may have failed due to wear and tear or electrical issues, preventing it from spinning or operating as intended.
- Blocked Flue: A blockage in the flue system can cause the fan to malfunction, as it may not be able to expel gases effectively.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting to fix electrical or gas-related faults without proper training can lead to serious safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F26 fault typically ranges around £150 to £250, depending on whether the fan needs to be replaced or if there are additional issues such as a blocked flue that require attention.