BoilerFaultCodesIdeal 9.1.3 Fault Code
Also written as 913 — same fault.
The Ideal 9.1.3 fault code means: your boiler has detected that its electrical power wires have been connected in the wrong order, preventing it from starting up safely.. It appears on 1 Ideal model in our database.
Technical description: Live and Neutral reversed
What causes the Ideal 9.1.3 fault?
This fault occurs when the electrical supply to the boiler has been wired incorrectly, meaning the 'live' and 'neutral' power connections are swapped. This often happens after recent electrical work in the home or if a new plug or fused spur was installed without checking the correct polarities. To ensure your safety, the boiler's internal computer detects this error and prevents the system from firing up.
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 9.1.3 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 9.1.3 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