BoilerFaultCodesAlpha 15 Fault Code
The Alpha 15 fault code means: your boiler’s internal computer is confused about how it is set up and is unable to operate because it detects a mismatch between its configuration settings and the hardware it sees.. It appears on 25 Alpha models in our database.
Technical description: Incorrect configuration - Incorrect hydraulic configuration. There is an inconsistency between the settings and signals received from the PCB
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Alpha models that show the 15 fault code
Click a model for the full fault code list and model-specific repair notes.
- 240XE Repair: £150-300
- CD18 / CD24 Repair: £150-350
- Cd50s Cd70s Repair: £200-400
- E-Tec 28 Repair: £120-250
- E-Tec 33 Repair: £120-250
- E-Tec NX Repair: £80-160
- E-Tec NXS Repair: £70-130
- E-Tec Plus Repair: £120-250
- E-Tec Plus 10 / 18 Repair: £100-280
- E-Tec Plus 28 Repair: £120-250
- E-Tec Plus 33 Repair: £120-250
- E-Tec Plus NX Repair: £90-180
- E-Tec Regular Repair: £120-250
- E-Tec S Repair: £100-£250
- Eco Repair: £120-250
- Eco 11 13 Repair: £120-250
- Evoke Repair: £120-250
- Evoke 10 / 18 Repair: £100-£350
- Evoke NX Repair: £90-200
- Intec 40GS2 Repair: £120-250
- Intec 50CS Repair: £150-300
- Intec S Repair: £120-250
- Intec2 25 28XE Repair: £150-300
- Intec2 30SE Repair: £150-300
- SY9 24 Repair: £200-450
Source
Alpha 15 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 7 July 2026