Emergency
6 / C on Ideal Maximiser SE

Your boiler is continuing to burn gas even when it should have shut down, which means it cannot stop heating correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description

Ionisation occurs when heat is no longer required, the gas valve does not close.

Engineer required

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

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