83 High

ECA 83 Fault Code

The ECA 83 fault code means: your boiler has lost the digital connection between its main control board and the external controls or display, meaning it cannot receive the signals it needs to operate.. It appears on 1 ECA model 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: BSB cable cross-section � no communication
Typical repair cost £90-250 (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 83 fault code

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

Source

ECA 83 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