BoilerFaultCodesAlpha E72 Fault Code
The Alpha E72 fault code means: your boiler has detected a problem with the sensor that monitors the temperature of the water returning from your radiators, preventing it from heating your home correctly.. It appears on 12 Alpha models in our database.
Technical description: Primary return sensor fault
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Alpha models that show the E72 fault code
Click a model for the full fault code list and model-specific repair notes.
- C25 Xtraflame Repair: £120-180
- E-Tec Plus Repair: £120-220
- E-Tec Plus 24 Repair: £120-220
- E-Tec Plus 28 Repair: £120-220
- E-Tec Plus 33 Repair: £120-220
- Evoke Repair: £120-200
- Evoke 10 / 18 Repair: £90-160
- H25 Xtraflame Repair: £120-180
- Intec 28GS Repair: £120-180
- Intec 50CS Repair: £120-180
- Intec2 25 28XE Repair: £120-200
- Intec2 30SE Repair: £120-200
Source
Alpha E72 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