What does the Glow-worm Energy F22 fault code mean?
The F22 fault code on a Glow-worm Energy boiler indicates a dry fire condition or low water pressure within the system. 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, bleeding radiators, or insufficient water supply.
- Air in the System: Trapped air can prevent proper water circulation, leading to a dry fire condition.
Can I fix it myself? (DIY)
If you are comfortable, you can check the pressure gauge on your boiler; it should typically be between 1-1.5 bar. If it’s below this, you can re-pressurise the system by following the manufacturer’s instructions. However, if the issue persists or involves gas or electrical components, it is crucial to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated cost for addressing the F22 fault, particularly if it involves re-pressurising the system or fixing leaks, is around £150-£200. This includes the cost of a Gas Safe Engineer’s visit and any minor repairs needed.