BoilerFaultCodesIdeal LE Fault Code
The Ideal LE fault code means: your boiler's main control computer is experiencing a communication or processing error, which has caused it to stop working for your safety.. It appears on 2 Ideal models in our database.
Technical description: PCB ERROR
What causes the Ideal LE fault?
This fault occurs when the internal sensors detect that there isn't enough water circulating through the pipes and radiators. The most common reason is a small leak somewhere in the system or because the radiators were recently bled, causing the overall pressure to drop below the safe operating limit.
This code often appears in autumn when homeowners turn their heating back on for the first time after summer, as stagnant seals may have leaked or air has settled in the radiators.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ideal models that show the LE fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal LE 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