Low
F8 on Alpha C25 Xtraflame

Your boiler is currently running an automated 18-hour maintenance cycle to remove trapped air bubbles from your heating system, and you should simply wait for this process to complete.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

System deaeration in progress. During this phase, which lasts 18 hours, the boiler pump is started at pre-established intervals, thus allowing deaeration of the central heating system.

Engineer required

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

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