High
6 / H on Ideal Maximiser SE

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

The ionisation (the flame) directly extinguishes after ignition.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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