BoilerFaultCodesIdeal 441 Fault Code
The Ideal 441 fault code means: your boiler's internal computer brain has developed a terminal electronic glitch and can no longer control the heating process safely.. It appears on 2 Ideal models in our database.
Technical description: internal failure - electronic
What causes the Ideal 441 fault?
This fault occurs when the boiler's main control board suffers a critical hardware failure, meaning it can no longer process data or send signals to other components. The most common reasons for this are electrical surges that damage the delicate circuitry or general wear and tear on the board's capacitors over time. Because the 'brain' of the boiler is essentially broken, it can no longer guarantee safe operation.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the 441 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 441 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 27 April 2026