BoilerFaultCodesIdeal L 0- Fault Code
Also written as L0 — same fault.
The Ideal L 0- fault code means: your boiler has locked itself out because it has been manually reset too many times in a short period while trying to clear an underlying fault.. It appears on 1 Ideal model in our database.
Technical description: 5 Boiler Resets in 15 minutes
DIY fix possible
Turn the boiler power off at the fused spur switch (the wall switch).Wait for at least five minutes to allow the internal timer to clear.Turn the power back on and see if a different primary fault code (such as F1 or L2) appears.
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Ideal models that show the L 0- fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal L 0- fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026