E83 High

ECA E83 Fault Code

The ECA E83 fault code means: your boiler has shut down because the exhaust fumes have become too hot, which suggests a blockage or a build-up of debris inside the main heat exchanger.. It appears on 3 ECA models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: High Temperature Error for Flue Gas — twice F07 error in last month (lockout) — main exchanger problem; press Reset; if persists notify ECA authorised service
Typical repair cost £180-600 (including labour)

Engineer required

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

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ECA models that show the E83 fault code

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

Source

ECA E83 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026