How much does it cost to fix Ariston error code E02 078?

Typical repair cost for the Ariston E02 078 fault is £150-300 including labour.

E02 078 High

Ariston E02 078 Fault Code

Q: What does the Ariston E02 078 fault code mean?

Your boiler has detected that no water is circulating through the heating system correctly, causing it to shut down to prevent internal overheating.

Also written as E02078 — same fault.

The Ariston E02 078 fault code means: your boiler has detected that no water is circulating through the heating system correctly, causing it to shut down to prevent internal overheating.. It appears on 5 Ariston models in our database.

Technical description: Main burner

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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Ariston models that show the E02 078 fault code

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

Source

Ariston E02 078 fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

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