How much does it cost to fix Keston error code E03-884?

Typical repair cost for the Keston E03-884 fault is £150-300 including labour.

E03-884 High

Keston E03-884 Fault Code

Q: What does the Keston E03-884 fault code mean?

Your boiler is failing to communicate with its built-in internal memory chip, meaning it cannot access the configuration information needed to run properly.

Also written as E03884 — same fault.

The Keston E03-884 fault code means: your boiler is failing to communicate with its built-in internal memory chip, meaning it cannot access the configuration information needed to run properly.. It appears on 2 Keston models in our database.

Technical description: Data Badge

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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Keston models that show the E03-884 fault code

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

Source

Keston E03-884 fault code information on this page is sourced and cross-checked against the official Keston service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026