What does the Glow-worm Flexicom F26 fault code mean?
The F26 fault code on a Glow-worm Flexicom boiler indicates an overheating issue, which can lead to potential damage if not addressed promptly. This fault typically arises when the boiler’s temperature exceeds safe operating limits, triggering a safety shutdown.
Common Causes
- Blocked Heat Exchanger: A buildup of debris or limescale can restrict water flow, causing the boiler to overheat.
- Faulty Thermostat: If the thermostat is malfunctioning, it may not accurately regulate the boiler’s temperature, leading to overheating.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as overheating can involve complex gas and electrical components that require professional expertise. Attempting DIY repairs could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing an F26 fault could range from £150 to £300, depending on whether the heat exchanger needs cleaning or replacement, or if the thermostat requires servicing. This estimate includes parts and labour.