What does the Glow-worm Betacom F63 fault code mean?
The F63 fault code indicates a problem with the domestic hot water (DHW) inlet temperature sensor. This fault suggests that the boiler is unable to accurately read the temperature of the incoming water, which can affect the heating performance.
Common Causes
- Faulty DHW Inlet Sensor: The temperature sensor may be malfunctioning or damaged, leading to incorrect readings.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent proper water flow, causing temperature discrepancies.
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 to fix it yourself may void warranties or cause further damage.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F63 fault could range around £150 to £250, primarily due to the potential need for a new DHW inlet sensor and labour costs associated with a qualified engineer’s visit.