What does the Glow-worm Betacom F98 fault code mean?
The F98 fault code on the Glow-worm Betacom indicates a central heating outlet pressure fault, which suggests that the boiler is not maintaining the correct pressure in the heating system. This can lead to inadequate heating performance and may require immediate attention to avoid further issues.
Common Causes
- Low Water Pressure: Insufficient water pressure in the system can trigger this fault, often due to leaks or insufficient filling.
- Faulty Pressure Sensor: A malfunctioning pressure sensor may incorrectly report pressure levels, causing the boiler to display the F98 fault code.
Can I fix it myself? (DIY)
If you are comfortable, you can check the pressure gauge on the boiler and attempt to refill the system if the pressure is low (typically below 1 bar). However, if the issue persists or involves gas components, it is crucial to call a Gas Safe Engineer for safety and compliance.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F98 fault could range from £150 to £250, primarily depending on whether the issue is a simple pressure refill or requires replacement of a faulty pressure sensor, which can be more expensive due to parts and labour.