Low
5 nn on Keston C90 / C110

Your boiler is currently recalibrating its internal settings and should return to normal operation automatically once the process is complete.

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

Temporary mode whilst module adjusts its internal settings

Engineer required

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

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Search the official register →

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