BoilerFaultCodesTechnical description
Ignition LOCKOUT - After five attempts (possibly due to air in the gas supply) it will lockout
What causes this fault?
This fault occurs when the boiler cannot detect a stable flame after several attempts to fire up. It is often caused by a lack of gas reaching the burner, a worn-out spark electrode that can no longer create a light, or a dirty sensor that fails to tell the boiler the flame is actually lit.
This issue can occur more frequently during the first cold snap of autumn when components that have been idle all summer suddenly fail under the strain of constant use.
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.
Find a Gas Safe engineer
Search the official register →