What does the Glow-worm Betacom F88 fault code mean?
The F88 fault code on the Glow-worm Betacom indicates a malfunction with the central heating outlet temperature sensor. This sensor is crucial for monitoring the temperature of the water being circulated through the heating system.
Common Causes
- Faulty Temperature Sensor: The sensor may be defective or damaged, leading to incorrect readings.
- Wiring Issues: Damaged or loose wiring connections to the sensor can disrupt its functionality.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves electrical components and potential gas safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the central heating outlet temperature sensor is around £120. This includes the cost of the part and labour, reflecting the typical rates for a qualified engineer in the UK.