What does the Glow-worm Ultimate F44 fault code mean?
The F44 fault code on the Glow-worm Ultimate indicates a fault with the domestic hot water (DHW) valve. This typically means that the valve is not operating correctly, which can prevent hot water from being delivered.
Common Causes
- Faulty DHW Valve: The valve may be stuck or malfunctioning, preventing it from opening or closing properly.
- Electrical Issue: There could be a problem with the wiring or connections to the valve, leading to a failure in operation.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that can be dangerous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the DHW valve fault could be around £200 to £300, depending on whether the valve needs to be replaced or if it can be repaired. This cost reflects the price of parts and labour for a qualified engineer.