E05234 High

Alpha E05234 Fault Code

The Alpha E05234 fault code means: your boiler has detected an electrical fault with the internal sensors or circuit board, preventing it from heating your water safely.. It appears on 1 Alpha model 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: 8434250
Typical repair cost £180-450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Alpha models that show the E05234 fault code

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

Source

Alpha E05234 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