EICR codes explained: C1, C2, C3 and FI
By Azzeddine Kebbi, NAPIT-registered electrician and director of Kebbi Electrical Services · Updated 10 November 2026
What each code on an Electrical Installation Condition Report means, and what happens next. New to EICRs? Start with what is an EICR.
The four codes
C1 – Danger present
There is a risk of injury now. It is made safe straight away, for example exposed live parts that could be touched.
C2 – Potentially dangerous
Not dangerous this minute, but could become dangerous if something else goes wrong, for example signs of overheating or a missing earth where one is needed. It needs putting right urgently.
C3 – Improvement recommended
Something that does not meet current standards but is not dangerous. Worth doing, but it does not fail the report.
FI – Further investigation
Something needs looking at more closely before it can be coded, for example a circuit that could not be traced or tested.
Satisfactory or unsatisfactory?
Any C1, C2 or FI makes the report unsatisfactory. C3 items on their own do not. The report also gives the date the next inspection is due.
What happens next
If your report has C1, C2 or FI items, we explain each one in plain English and give you a price for the work. Once it is done you get the certificate that shows it has been put right. Landlords must have these items fixed within 28 days, or sooner if the report says so.
Wondering what an EICR costs? See how much an EICR costs in Bristol. A failed fuse board is one of the most common C2 items, see does my fuse board need replacing? Older homes often still have red and black wiring: see UK wiring colours explained.
Common questions
Need an inspection? Book an EICR in Bristol from £195 for flats and £220 for houses.
Bonding is one of the most common EICR findings. See what is earth bonding.
Does a C3 fail an EICR?
No. C3 means improvement recommended. A report with only C3 items is satisfactory.
What makes an EICR unsatisfactory?
Any C1, C2 or FI observation.
How quickly must a landlord fix C1 and C2 items?
Within 28 days, or sooner if the report says so, and then send written confirmation to the tenants and the council within 28 days of the work being finished.
Can you fix the items on my report?
Yes. We explain each item, quote for the work and issue the paperwork once it is done.
Book or ask a question
Call or WhatsApp 07943 951993, or send an enquiry with your address and what you need. We confirm the price before anything is booked.