How much does it cost to fix Glow-worm error code Xtramax HE Range?

Typical repair cost for the Glow-worm Xtramax HE Range fault is £150-£400 including labour.

Xtramax HE Range High

Glow-worm Xtramax HE Range Fault Code

Q: What does the Glow-worm Xtramax HE Range fault code mean?

Your boiler has detected that the water temperature is rising too quickly, which usually means water isn't circulating properly through the system.

Also written as XTRAMAXHERANGE — same fault.

The Glow-worm Xtramax HE Range fault code means: your boiler has detected that the water temperature is rising too quickly, which usually means water isn't circulating properly through the system.. It appears on 3 Glow-worm models in our database.

Technical description: F24

Typical repair cost £150-£400 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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 Xtramax HE Range fault code

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

Source

Glow-worm Xtramax HE Range 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