EICR codes explained — C1, C2, C3 and FI
An EICR grades each issue it finds with a code. C1 means danger is present and needs fixing immediately; C2 means potentially dangerous and needs attention soon; C3 is an improvement recommendation that doesn't fail the report; and FI means an item needs further investigation. Any C1, C2 or FI makes the overall report 'unsatisfactory'.
Why codes are used
When an electrician inspects an installation for an EICR, they don't just pass or fail it — they record each observation with a classification code from BS 7671. The codes tell you how serious each issue is and how urgently it needs dealing with, so you can prioritise.
C1 — danger present
A C1 means there's a risk of injury right now — for example, exposed live parts you could touch. It's the most serious code. A good electrician will make it safe on the spot where they can, and it must be put right immediately.
C2 — potentially dangerous
A C2 isn't dangerous this second, but it could become so — for example, no earthing on a circuit that would only bite if another fault developed. C2s need fixing promptly, and like C1s they make the report 'unsatisfactory' until resolved.
C3 and FI
A C3 is an improvement recommendation — the installation is safe and passes, but bringing the item up to the latest standard would be sensible. A report can be 'satisfactory' with C3s on it.
FI ('further investigation') means something needs a closer look before it can be coded — for example, a circuit that couldn't be fully tested on the day. An FI also makes the report unsatisfactory until it's resolved.
Does a C3 mean I failed my EICR?
No. C3 codes are recommendations only — a report can be 'satisfactory' with C3s. Only C1, C2 or FI codes make a report 'unsatisfactory'.
How quickly do C1 and C2 issues need fixing?
C1 (danger present) should be made safe immediately. For rented homes, the 2020 regulations require C1/C2 remedial work to be completed within 28 days (or sooner if the report specifies).
Can you fix the issues and reissue the certificate?
Yes — once the C1/C2/FI items are resolved, the report is reissued as 'satisfactory'. We quote any remedial work up front and often complete minor items on the same visit.