BoilerFaultCodesRavenheat 01 Fault Code
The Ravenheat 01 fault code means: your boiler has failed to light, which means you will not have any heating or hot water until the issue is resolved.. It appears on 5 Ravenheat models in our database.
Technical description: Boiler failed to ignite – problem with gas valve operation, fan failing to start, ignition control board and cables
What causes the Ravenheat 01 fault?
This fault occurs when the boiler's internal computer tries to start the combustion process but cannot detect a flame. The most common reasons are a lack of gas reaching the burner, a faulty fan not clearing the flue, or a failing ignition component that cannot generate the spark needed to light the gas.
This issue can occur after a period of inactivity in the summer or during cold snaps if external gas regulator components become sluggish.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ravenheat models that show the 01 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ravenheat 01 fault code information on this page is sourced and cross-checked against the official Ravenheat service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026