9-11 High

Ideal 9-11 Fault Code

Also written as 911 — same fault.

The Ideal 9-11 fault code means: your heat pump is unable to move water around the system correctly, which means your heating and hot water will stop working until the connection or pump is repaired.. It appears on 1 Ideal model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Outdoor unit Circulation pump Error
Typical repair cost £250-500 (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 9-11 fault code

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

Source

Ideal 9-11 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 7 July 2026