BoilerFaultCodesAlpha 0E2 Fault Code
The Alpha 0E2 fault code means: your boiler is unable to confirm that the burner has successfully lit, so it has safely shut itself down to prevent gas buildup.. It appears on 3 Alpha models in our database.
Technical description: Flame sensing fault.
What causes the Alpha 0E2 fault?
This fault occurs when the boiler's control system cannot confirm that a flame has ignited after several attempts. The most common reason is a worn-out or dirty sensing probe that can no longer detect the heat, or a fault within the internal wiring that prevents the signal from reaching the main control board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Alpha models that show the 0E2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Alpha 0E2 fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026