EICR Code F1 Explained (Correctly FI – Further Investigation)
Is F1 a Real EICR Code?
There is not normally an F1 code on an Electrical Installation Condition Report. In most cases, people searching for an F1 EICR code are actually looking for FI, which stands for Further Investigation Required.
FI can sometimes be misread as F1 on reports, especially if the lettering is small, handwritten, scanned or viewed on a phone.
If your report mentions FI, or you are searching for an F1 EICR code, Richard can help explain what it means and what should happen next.
RW Currion Electrical can help with EICR testing, electrical fault finding and further investigation work across Banbury and nearby villages.
Call Richard: 07740 100378
Office: 01295 533378
What Does FI Mean on an EICR?
An FI code means the electrician needs to carry out further investigation before confirming whether something is safe or unsafe.
It does not automatically mean the installation is dangerous, but it does mean the issue could not be fully assessed during the inspection.
Further investigation may be needed before the observation can be properly classified as:
• C1 – Danger present
• C2 – Potentially dangerous
• C3 – Improvement recommended
• No code, if no defect is found after investigation
Why Might an FI Code Be Given?
An FI observation may be used where something cannot be fully confirmed during the EICR.
Common reasons include:
• Limited access to parts of the installation
• Test results that need further checking
• Signs of possible hidden damage
• Unclear or unusual wiring arrangements
• Circuits that cannot be identified properly
• Possible borrowed neutrals or shared circuits
• Previous DIY or altered wiring
• Equipment or wiring that needs opening up to inspect safely
• A fault that appears intermittent
• Missing information about the original installation
The electrician should explain why further investigation is needed and what would need to be checked next.
Is an FI Code Serious?
An FI code should not be ignored. It means the inspector could not confirm the condition of part of the installation during the EICR.
The issue may turn out to be minor, but it may also uncover something that needs remedial work. Until the further investigation is carried out, the electrician cannot properly confirm whether the issue is safe, unsafe or simply an improvement recommendation.
For landlords, an FI code will usually need to be resolved before the report can be treated as satisfactory.
Does an FI Code Mean the EICR Has Failed?
EICRs are normally recorded as either satisfactory or unsatisfactory, rather than a simple pass or fail.
An FI code usually means the report is unsatisfactory until the further investigation has been completed. Once the issue has been investigated, it may be reclassified depending on what is found.
For example, further investigation may lead to:
• A C2 code if a potentially dangerous issue is confirmed
• A C3 code if improvement is recommended
• No further issue if the installation is found to be safe
• Remedial work if a fault or defect is found
Helpful Resources
You can also explore these related EICR pages:
• EICR Banbury
• What do EICR codes mean?
• C1 EICR Code
• C2 EICR Code
• C3 EICR Code
• FI EICR Code
These pages explain the different EICR codes and what they may mean for landlords, homeowners, buyers and small commercial properties.
Need an Honest, Professional EICR in Banbury or the Surrounding Areas?
If you need an honest, professional EICR carried out in Banbury or the surrounding areas, RW Currion Electrical can help with landlord, homeowner, home buyer and small commercial electrical safety checks.
Richard provides clear reports, practical advice and can explain any C1, C2, C3 or FI observations found during the inspection.
Visit the EICR Banbury service page to arrange an Electrical Installation Condition Report.