How much does it cost to fix Alpha error code 87?

Typical repair cost for the Alpha 87 fault is £150-300 including labour.

87 High

Alpha 87 Fault Code

Q: What does the Alpha 87 fault code mean?

Your boiler has detected a problem with the internal safety controls that manage the fuel supply, so it has safely shut itself down to prevent operation.

The Alpha 87 fault code means: your boiler has detected a problem with the internal safety controls that manage the fuel supply, so it has safely shut itself down to prevent operation.. It appears on 10 Alpha models in our database.

Technical description: Block - gas valve control. A malfunction of one of the components that control the gas valve has been detected

Typical repair cost £150-300 (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 87 fault code

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

Source

Alpha 87 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