75 / 76 High

Alpha 75 / 76 Fault Code

Also written as 7576 — same fault.

The Alpha 75 / 76 fault code means: your boiler is struggling to accurately measure its own temperature, meaning it cannot safely or effectively heat your water.. 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: Return/flow sensor fault from possible failure of one or both sensors
Typical repair cost £100-180 (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 75 / 76 fault code

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

Source

Alpha 75 / 76 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