What does the Glow-worm Energy F48 fault code mean?
The F48 fault code indicates a flue blockage in the Glow-worm Energy boiler. This blockage can prevent the safe expulsion of combustion gases, posing a risk to the boiler’s operation and safety.
Common Causes
- Blocked Flue Pipe: Debris, such as leaves or bird nests, can obstruct the flue pipe, preventing proper ventilation.
- Internal Flue Issue: A fault within the boiler’s internal flue system may restrict airflow, leading to the F48 error.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to address this issue, as working on flue systems can be dangerous and requires professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving a flue blockage is around £150 to £250. This includes inspection and potential cleaning or replacement of the flue components.