How much does it cost to fix Ideal error code E 11?

Typical repair cost for the Ideal E 11 fault is £250-450 including labour.

E 11 High

Ideal E 11 Fault Code

Q: What does the Ideal E 11 fault code mean?

Your boiler's internal computer is experiencing a memory error, which means it cannot process its own settings and has shut down as a safety precaution.

Also written as E11 — same fault.

The Ideal E 11 fault code means: your boiler's internal computer is experiencing a memory error, which means it cannot process its own settings and has shut down as a safety precaution.. It appears on 1 Ideal model in our database.

Technical description: EPROM read/write error

Typical repair cost £250-450 (including labour)

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 E 11 fault code

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

Imax W Repair: £250-450

Source

Ideal E 11 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