H E High

Ideal H E Fault Code

Also written as HE — same fault.

The Ideal H E fault code means: your boiler has detected a communication conflict between its internal electronic control panels, meaning it cannot currently coordinate its functions safely.. It appears on 7 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: GO TO FRAME 76
Typical repair cost £150-300 (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 H E fault code

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

Source

Ideal H E 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