Alpha Boiler Fault Codes

1,207 fault codes across 45 Alpha boiler models — explained in plain English.

Italian-owned brand with UK manufacturing. Budget-friendly with wide installer base.

Alpha fault codes on this site

We document 1,207 fault codes across 45 Alpha models, covering 226 distinct codes. Alpha boilers use plain numeric codes such as 12, 16, 20. Codes for 38 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: E-Tec Regular, E-Tec 28, E-Tec 33, E-Tec Plus 28, E-Tec Plus 33, CD24, CD28, CB24, CB28, Pro Tec 24, C27, C19, CD18 / CD24, E-Tec Plus 38, Evoke, Intec 50CS, Pro Tec Plus, 500e, CD C, Intec2 25 28XE, Eco, CD25X, Intec 40GS, 240E / 280E, 240XE, C23, CB50, Cd13r, HETEC, Intec² 30SE, Eco 11 13, Evoke 10 / 18, CD Systematic, Cd50s Cd70s, Intec S, CD S, SY9 24, E-Tec NX, E-Tec S, E-Tec Plus NX, E-Tec NXS, Evoke NX, CD28X, Intec 30GS, Intec² 20SE.

Codes that appear on the most Alpha models:

24 31 15 12 16 20

Just want the most common Alpha problems?

The top 8 faults across the whole Alpha range — causes, DIY checks, repair costs.

Most serious

High-severity Alpha fault codes

Your boiler has stopped working because the internal fan, which safely helps the system breathe and clear exhaust gases, is not spinning correctly.

E-Tec Regular

Your boiler is struggling to detect the flame needed to heat your water, even if the burner has successfully lit.

E-Tec Regular

Your boiler has detected a problem with the sensor that monitors the temperature of the water returning from your radiators.

E-Tec Regular

Your boiler has detected that water is not moving through the system quickly enough to prevent it from overheating.

E-Tec Regular

Your boiler has detected a problem with the sensor that monitors exhaust gases, and it has shut down for safety purposes.

E-Tec Regular

All models

45 Alpha boiler models

E-Tec Regular

Regular

36 fault codes · 2019-present

E-Tec 28

Combi

32 fault codes · 2018-present

E-Tec 33

Combi

32 fault codes · 2018-present

E-Tec Plus 28

Combi

32 fault codes · 2019-present

E-Tec Plus 33

Combi

32 fault codes · 2019-present

CD24

CombiSystem Discontinued

6 fault codes · 2006-2010

Alpha Boiler Fault Codes

Alpha fault codes on this site

High-severity Alpha fault codes

45 Alpha boiler models

Avoid the next call-out bill