Glow-worm Betacom C Fault codes & diagnostics

1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Combi Natural Gas 24-30 kW 2008 onwards Discontinued

Replaced by: Betacom 4

Choose your boiler type

The Betacom C range comes in 3 types

Pick the one you have. The fault codes, GC numbers and manual differ by type.

Betacom 24c 1 codes · 1 GC number Betacom 30c 1 codes · 1 GC number Betacom3 24c 38 codes · 1 GC number
Each model has its own manual A family spans several manuals, one per model or generation. Pick your model above and its page has the manual its fault codes were read from.

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Fault codes

All 1 documented codes

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Condensate Drain Blockage

Your boiler has stopped working because the waste water pipe that carries away moisture is blocked, often due to frozen debris inside the pipe outside your home.

High DIY-safe £80-150 Shared across the Betacom C range

What to check first

  1. Locate the plastic condensate pipe running outside from your boiler.
  2. Pour warm (not boiling) water slowly over the outside of the pipe to melt any ice blockage.
  3. Place a container underneath the end of the pipe to catch any water if it is frozen inside.
  4. Once the water flows freely, reset your boiler using the reset button on the front panel.

Parts commonly replaced

  • Condensate trap
  • Condensate siphon
Full explanation for Condensate Drain Blockage
Status & diagnostic codes

8 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

2.3 Diagnostic Your boiler is struggling to maintain the correct gas pressure required to run efficiently, which is preventing it from firing up properly. 2.5 Diagnostic Your boiler is struggling to maintain the correct gas pressure required to keep the flame burning steadily for your heating and hot water. 6.0 Diagnostic Your boiler is struggling to maintain the correct gas pressure required to run properly, which usually prevents it from heating your water or home. 8.0 Diagnostic Your boiler is struggling to maintain the correct gas pressure required to heat your home properly, which means it will stop working until it is adjusted. 12.5 Diagnostic Your boiler is displaying a technical pressure setting that is not meant for user adjustment and indicates that the burner is not operating within its required parameters. 14 Diagnostic Your boiler is struggling to maintain the correct gas pressure required for it to run safely and efficiently. 36.0 Diagnostic Your boiler is struggling to maintain the correct gas pressure for the burner, which prevents it from heating your home or water safely. 36.5 Diagnostic Your boiler is struggling to maintain the correct gas pressure required to run efficiently, which means it may fail to heat your home or water properly.