High
01 on Ravenheat TS 90

Your boiler has failed to light, which means you currently have no heating or hot water because the system cannot create a 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

Boiler failed to ignite – problem with gas valve operation, fan failing to start, ignition control board and cables

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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Related fault codes

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