9.1.13 High

Ideal 9.1.13 Fault Code

Also written as 9113 — same fault.

The Ideal 9.1.13 fault code means: your indoor and outdoor units are failing to speak to each other, meaning your central heating and hot water have stopped working.. 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: No connection Outdoor PCB to Indoor PCB (H0)

What causes the Ideal 9.1.13 fault?

This fault occurs when the digital handshake between your indoor unit and the outdoor heat pump is broken, preventing them from sharing vital operating data. The most common reasons are a loose or damaged communication cable between the two units, or a component failure on one of the electronic circuit boards. Without this constant flow of information, the system shuts down as a safety precaution to avoid running blindly.

This fault can sometimes be triggered during periods of heavy rain or high humidity if moisture enters the outdoor terminal box and interferes with the sensitive data connections.

Typical repair cost £180-450 (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 9.1.13 fault code

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

Source

Ideal 9.1.13 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