What does the Glow-worm Betacom F71 fault code mean?
The F71 fault code indicates a problem with the domestic hot water (DHW) inlet temperature sensor in the Glow-worm Betacom boiler. This sensor is responsible for monitoring the temperature of the water entering the system, and a fault can disrupt the boiler’s ability to heat water effectively.
Common Causes
- Faulty Temperature Sensor: The sensor may be malfunctioning or damaged, leading to incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the sensor can cause communication failures between the sensor and the boiler’s control board.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and potential safety risks. Attempting to fix it yourself may void warranties or lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the DHW inlet temperature sensor is around £120 to £180. This includes the cost of the part and labour, as the sensor itself is relatively inexpensive, but professional installation is necessary for safety and compliance.