What does the Glow-worm Energy F93 fault code mean?
The F93 fault code on the Glow-worm Energy boiler indicates a problem with the domestic hot water (DHW) gas supply. This issue can prevent the boiler from heating water effectively, leading to a lack of hot water in the system.
Common Causes
- Blocked Gas Supply: A blockage in the gas supply line can restrict gas flow to the boiler, causing the F93 fault.
- Faulty Gas Valve: A malfunctioning gas valve may not open or close properly, preventing the necessary gas supply for hot water.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any issues related to gas supply or electrical components. Attempting to fix these problems without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F93 fault could be around £150 to £250, depending on whether the issue is a blockage or a faulty gas valve. This estimate includes labour and parts, as gas-related repairs require professional expertise.