Ideal 69 H......n........ Fault Code
Also written as 69HN — same fault.
The Ideal 69 H......n........ fault code means: your boiler has detected an electrical wiring issue where the live and neutral connections are reversed, preventing it from starting for safety reasons.. It appears on 2 Ideal models in our database.
Technical description: PHASE REVERSAL ERROR
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 69 H......n........ fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 69 H......n........ 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