How much does it cost to fix Glow-worm error code Betacom c?

Typical repair cost for the Glow-worm Betacom c fault is £80-250 including labour.

Betacom c High

Glow-worm Betacom c Fault Code

Q: What does the Glow-worm Betacom c fault code mean?

Your boiler has likely lost water pressure or there is a blockage preventing water from circulating properly, causing the system to stop heating.

Also written as BETACOMC — same fault.

The Glow-worm Betacom c fault code means: your boiler has likely lost water pressure or there is a blockage preventing water from circulating properly, causing the system to stop heating.. It appears on 3 Glow-worm models in our database.

Technical description: Temperature 30 flashing

Typical repair cost £80-250 (including labour)

DIY fix possible

Check the pressure gauge on the front of the boiler; if it is below 1.0 bar, you need to top it up.Locate the filling loop underneath the boiler and slowly turn the valves until the pressure reaches 1.5 bar.Ensure all radiator valves are open and that your pump is running if accessible.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Glow-worm models that show the Betacom c fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Glow-worm Betacom c fault code information on this page is sourced and cross-checked against the official Glow-worm service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026