What does the Glow-worm Betacom F65 fault code mean?
The F65 fault code on the Glow-worm Betacom indicates a problem with the domestic hot water (DHW) flow temperature. This typically suggests that the boiler is unable to achieve or maintain the required temperature for hot water delivery.
Common Causes
- Faulty Temperature Sensor: The temperature sensor may be malfunctioning, leading to incorrect readings and triggering the fault code.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent proper heat transfer, resulting in inadequate hot water temperature.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that can be dangerous if handled improperly. Attempting DIY repairs could void your warranty and pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F65 fault could be around £150 to £250, primarily depending on whether the temperature sensor needs replacement or if the heat exchanger requires cleaning or servicing.