E01 High

Alpha E01 Fault Code

The Alpha E01 fault code means: your boiler has failed to light, which means your heating and hot water will not work until the system is reset or the fuel supply is restored.. It appears on 30 Alpha models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Ignition failure
Typical repair cost £100-350 (including labour)

DIY fix possible

Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the propertyEnsure your gas meter has credit if you are on a prepay systemPress and hold the 'R' (Reset) button for a few seconds to try and restart the boiler

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Alpha models that show the E01 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Alpha E01 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