What does the Glow-worm Betacom F84 fault code mean?
The F84 fault code on the Glow-worm Betacom indicates a malfunction with the central heating flow temperature sensor. This sensor is crucial for monitoring the temperature of the water flowing through the heating system, and its failure can disrupt the boiler’s operation.
Common Causes
- Faulty Temperature Sensor: The sensor may be damaged or malfunctioning, 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 working with gas appliances can be dangerous. Attempting to fix electrical components without proper training can also lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the central heating flow temperature sensor on a Glow-worm Betacom is around £150. This includes the cost of the part and labour, as sensor replacements typically require professional installation to ensure safety and compliance with regulations.