Over-run Medium

Firebird Over-run Fault Code

Also written as OVERRUN — same fault.

The Firebird Over-run fault code means: your boiler is currently cooling itself down after getting too hot by running its internal pump to circulate water until the temperature drops.. It appears on 1 Firebird model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Pump over-run active at 93°C
Typical repair cost £120-250 (including labour)

Engineer required

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

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Firebird models that show the Over-run fault code

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

Source

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

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