Running lamp flashing Low

Warmworld Running lamp flashing Fault Code

Also written as RUNNINGLAMPFLASHING — same fault.

The Warmworld Running lamp flashing fault code means: your boiler is simply taking a short, programmed break before starting its next cycle to protect its internal components.. It appears on 2 Warmworld 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: The boiler built-in delay timer is active.
Typical repair cost £0 (including labour)

DIY fix possible

Wait 5 to 10 minutes for the internal timer to finish its countdown.Ensure your thermostat is turned up to call for heat.Check that nothing is blocking the external flue.

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Warmworld models that show the Running lamp flashing fault code

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

Source

Warmworld Running lamp flashing fault code information on this page is sourced and cross-checked against the official Warmworld service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026