What does the Glow-worm Betacom F22 fault code mean?
The F22 fault code on a Glow-worm Betacom boiler indicates a dry fire condition or low water pressure. This typically means that the boiler is unable to detect sufficient water flow, which can lead to overheating and potential damage.
Common Causes
- Low Water Pressure: This can occur due to leaks in the system or insufficient water supply, causing the pressure to drop below the required level.
- Air in the System: Trapped air can prevent water from circulating properly, leading to a dry fire situation.
Can I fix it myself? (DIY)
You can attempt to fix low water pressure by checking the pressure gauge and re-pressurising the system if it is below 1 bar. However, if you suspect air in the system or if the issue persists, it is strongly advised to call a Gas Safe Engineer for further diagnosis and repair.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F22 fault could range from £100 to £200, primarily for re-pressurising the system or bleeding radiators. If a more serious issue is identified, such as a leak or component failure, costs may increase significantly.