How to fix Glow-worm Betacom fault code F51

What does the Glow-worm Betacom F51 fault code mean?

The F51 fault code on the Glow-worm Betacom indicates a gas supply fault, which means the boiler is not receiving the necessary gas to operate correctly. This can prevent the boiler from igniting and providing heating or hot water.

Common Causes

  • Blocked Gas Supply: A blockage in the gas line can restrict the flow of gas to the boiler.
  • Faulty Gas Valve: A malfunctioning gas valve may fail to open or close properly, disrupting the gas supply.

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 issues without proper training can be dangerous.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving a gas supply fault like the F51 could range from £150 to £300, depending on whether the issue is a simple blockage or requires replacement of the gas valve.