BoilerFaultCodes E02 High
Alpha E02 Fault Code
The Alpha E02 fault code means: your boiler has switched itself off because it has detected an internal temperature that is too high, likely due to a flow problem or a blockage.. It appears on 29 Alpha models in our database.
Technical description: Safety thermostat intervention (overheating)
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 E02 fault code
Click a model for the full fault code list and model-specific repair notes.
- C25 Xtraflame Repair: £120-250
- CB24 Repair: £120-250
- CB28 Repair: £120-250
- Cb50 Repair: £120-250
- Cd13r Repair: £120-250
- CD24 Repair: £120-250
- Cd25 Repair: £90-280
- CD28 Repair: £120-250
- E-Tec Repair: £120-250
- E-Tec 24 Repair: £120-250
- E-Tec 28 Repair: £120-250
- E-Tec 33 Repair: £120-250
- E-Tec Plus Repair: £120-250
- E-Tec Plus 10 / 18 Repair: £100-280
- E-Tec Plus 24 Repair: £120-250
- E-Tec Plus 28 Repair: £120-250
- E-Tec Plus 33 Repair: £120-250
- E-Tec R Repair: £120-250
- Evoke Repair: £120-250
- Evoke 10 / 18 Repair: £120-280
- H25 Xtraflame Repair: £120-250
- Intec 28GS Repair: £120-250
- Intec 40GS2 Repair: £120-250
- Intec 50CS Repair: £120-250
- Intec2 25 28XE Repair: £120-250
- Intec2 30SE Repair: £120-250
- Pro Tec 24 Repair: £120-250
- Pro Tec Plus Repair: £120-250
- SY Repair: £120-250
Source
Alpha E02 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