BoilerFaultCodesTechnical description
Ignition control circuit lockout. Boiler fails to light during the ignition attempt period (10 secs approx.). This is indicated by the status LED (26) flashing red accompanied by a flashing error code 01 shown in the temperature indicator (27).
What causes this fault?
This fault occurs when the boiler fails to detect a flame after several attempts to start up. The most common reasons include a lack of gas reaching the unit, a worn-out ignition spark electrode, or a faulty gas valve that isn't opening correctly. It essentially means the boiler is trying to light itself, but for one of these reasons, the fire simply won't catch.
This fault can be more common during the first cold snap of autumn when internal components like the gas valve may stick after being used less frequently over the summer.
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.