How much does it cost to fix Glow-worm error code All Boilers?

Typical repair cost for the Glow-worm All Boilers fault is £100-£350 including labour.

All Boilers High

Glow-worm All Boilers Fault Code

Q: What does the Glow-worm All Boilers fault code mean?

Your boiler has failed to ignite and cannot produce heat, which is usually due to an interrupted gas supply, a blocked condensate pipe, or a component failure.

Also written as ALLBOILERS — same fault.

The Glow-worm All Boilers fault code means: your boiler has failed to ignite and cannot produce heat, which is usually due to an interrupted gas supply, a blocked condensate pipe, or a component failure.. It appears on 3 Glow-worm models in our database.

Technical description: F28 / F1 / F4

Typical repair cost £100-£350 (including labour)

DIY fix possible

Check if other gas appliances in your home, like a hob, are working to confirm your gas supply is on.If it is freezing outside, check if the white plastic condensate pipe leading outdoors is frozen and thaw it with warm water.Press the reset button (usually marked with a flame or 'reset') and hold for five seconds.

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Glow-worm models that show the All Boilers fault code

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

Source

Glow-worm All Boilers 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