What does the Glow-worm Energy F27 fault code mean?
The F27 fault code on the Glow-worm Energy boiler indicates a water flow fault, which typically means that the boiler is not receiving adequate water flow to operate efficiently. This can lead to overheating and potential damage if not addressed promptly.
Common Causes
- Blocked Filter: A blockage in the system filter can restrict water flow, triggering the F27 fault code.
- Low Water Pressure: Insufficient water pressure in the system can prevent proper circulation, causing the boiler to display this fault.
Can I fix it myself? (DIY)
If you are comfortable, check the pressure gauge on your boiler; it should typically be between 1-1.5 bar. If it’s low, you can top up the system using the filling loop. However, if the issue persists or involves gas or electrical components, it is crucial to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F27 fault could be around £150 to £250, depending on whether a filter cleaning or replacement is needed, or if a pressure issue requires professional intervention.