What does FI mean on an EICR?

Read the observation beside FI. Access restrictions may explain a recorded limitation, but a locked cupboard or inaccessible fitting does not automatically justify FI. The inspector must explain the unresolved potential safety concern.

Under the current A4:2026 EICR format, an FI observation is advisory and does not by itself make the overall assessment unsatisfactory. If the front page says unsatisfactory, look for the C1 and C2 observations. FI is not that result.

Earlier report editions treated FI differently. Read the edition and instructions on your own report.

As checked on 1 October 2026, current GOV.UK guidance for rented property in England still says that where an applicable report requires remedial or further investigative work, the landlord must complete it within 28 days or any shorter period the report specifies. That duty is separate from the BS 7671 classification outcome.

See the IET explanation of further investigation and the A4:2026 changes.

• It does not name one universal cause.
• It does not say the circuit is safe to keep using.
• It does not say which repair is required.
• It does not, by itself, make the overall assessment unsatisfactory.

Ask the electrician what investigation the observation calls for and agree its scope first. The resulting findings determine any repair quotation; arranging access and diagnosing a fault are separate tasks.

• Read the FI observation and any separate limitations; ask the inspector to explain unclear wording.
• Agree the investigation and access arrangements before asking for a fixed repair price.
• If the same report also has C1 or C2 items, deal with those from the observation wording. They are a separate list.
• Keep the report. The investigation is easier when the inspector's note travels with the request.

How the codes sit together is on the EICR code guide. Booking the inspection itself is EICR testing in London.

Send the full report and the investigation request when you ask for an investigation quotation so the scope can be reviewed.