69 H......n........ High

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.

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: PHASE REVERSAL ERROR
Typical repair cost £80-160 (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 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