BoilerFaultCodesAlpha E35 Fault Code
The Alpha E35 fault code means: your boiler has detected a flame inside when it should be turned off, which is a significant safety precaution that causes the system to shut down to prevent potential gas build-up.. It appears on 12 Alpha models in our database.
Technical description: Parasite flame (flame detected with gas valve closed)
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 E35 fault code
Click a model for the full fault code list and model-specific repair notes.
- Cd13r Repair: £150-300
- CD28 Repair: £150-300
- E-Tec Repair: £150-300
- E-Tec 24 Repair: £150-300
- E-Tec 28 Repair: £150-300
- E-Tec 33 Repair: £150-300
- E-Tec Plus Repair: £150-300
- E-Tec Plus 10 / 18 Repair: £120-350
- E-Tec Plus 24 Repair: £150-300
- E-Tec Plus 28 Repair: £150-300
- E-Tec Plus 33 Repair: £150-300
- E-Tec R Repair: £150-350
Source
Alpha E35 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