BoilerFaultCodes 10 Medium
Alpha 10 Fault Code
The Alpha 10 fault code means: your boiler is struggling to manage the water pressure inside its internal components, which may prevent your hot water from heating up properly.. It appears on 24 Alpha models in our database.
Technical description: DHW expansion device (if fitted)
Typical repair cost £120-250 (including labour)
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 10 fault code
Click a model for the full fault code list and model-specific repair notes.
- 240XE Repair: £120-250
- C25 Xtraflame Repair: £0-£120
- CD Repair: £80-150
- E-Tec Repair: £80-150
- E-Tec 24 Repair: £80-150
- E-Tec 28 Repair: £80-150
- E-Tec 33 Repair: £80-150
- E-Tec Plus Repair: £0-£120
- E-Tec Plus 10 / 18 Repair: £0-160
- E-Tec Plus 24 Repair: £0-£120
- E-Tec Plus 28 Repair: £0-£120
- E-Tec Plus 33 Repair: £0-£120
- E-Tec R Repair: £80-150
- Eco Repair: £80-150
- Eco 11 13 Repair: £0-120
- Evoke Repair: £80-150
- Evoke 10 / 18 Repair: £0-120
- H25 Xtraflame Repair: £0-£120
- Intec 24GS Repair: £80-150
- Intec 28GS Repair: £0-£120
- Intec 40GS2 Repair: £0-£120
- Intec 50CS Repair: £0-£120
- Intec2 25 28XE Repair: £0-£100
- Intec2 30SE Repair: £80-120
Source
Alpha 10 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