SE Low

Zanussi SE Fault Code

The Zanussi SE fault code means: your boiler is simply reminding you that its annual service is due soon; it is a notification rather than a breakdown.. It appears on 3 Zanussi models in our database.

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: Service timer function

What causes the Zanussi SE fault?

This notification is triggered by an internal clock within the boiler’s control board that tracks the time elapsed since its last professional maintenance check. It is not caused by a mechanical failure or a parts breakdown, but rather a pre-set countdown reaching its limit. Once the timer completes, the display shows this code to prompt you to book a Gas Safe engineer.

Typical repair cost £80-£120 (including labour)

Engineer required

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

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Zanussi models that show the SE fault code

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

Source

Zanussi SE fault code information on this page is sourced and cross-checked against the official Zanussi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026