How much does it cost to fix Ideal error code 6 / H?

Typical repair cost for the Ideal 6 / H fault is £120-250 including labour.

6 / H High

Ideal 6 / H Fault Code

Q: What does the Ideal 6 / H fault code mean?

Your boiler is lighting up for a split second before immediately shutting itself off because it cannot detect the flame.

Also written as 6H — same fault.

The Ideal 6 / H fault code means: your boiler is lighting up for a split second before immediately shutting itself off because it cannot detect the flame.. It appears on 1 Ideal model in our database.

Technical description: The ionisation (the flame) directly extinguishes after ignition.

Typical repair cost £120-250 (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 6 / H fault code

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

Maximiser SE Repair: £120-250

Source

Ideal 6 / H 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