d.92 Low

Glow-worm d.92 Fault Code

Also written as D92 — same fault.

The Glow-worm d.92 fault code means: this code is simply a status message indicating how your heating and hot water timer settings are currently configured, rather than a sign that your boiler is broken.. It appears on 3 Glow-worm models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Enable/Disable Internal Programmer 0: CH Off, DHW Off (default) 1: CH Off, DHW On 2: CH On, DHW Off 3: CH On, DHW On

DIY fix possible

Check your external heating controller or thermostat displayAdjust your time clock settings to your preferred heating and hot water scheduleMonitor the display to ensure the code changes to reflect your new active settings

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Glow-worm models that show the d.92 fault code

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

Source

Glow-worm d.92 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 7 July 2026