What fails an EICR?

What does failing an EICR mean?

An EICR is classified as unsatisfactory when it contains one or more C1, C2, or FI observations — faults that are dangerous, potentially dangerous, or that require further investigation before the installation can be considered safe.

1. No RCD protection, or inadequate RCD protection

This is the single most common reason for an unsatisfactory outcome, particularly in properties built before the 1990s. Older consumer units often have no RCD at all. This is typically coded C2. The usual remedy is a consumer unit replacement.

2. Absent or inadequate bonding

Main bonding connects metallic services entering the property — water pipes and gas pipework — to the earth of the electrical installation. If this bonding is absent or undersized, it is a significant safety issue typically coded C2.

3. Deteriorated or substandard wiring

Old rubber-insulated or fabric-covered wiring becomes brittle over time. When insulation degrades, there is a risk of short circuits, earth faults, and fire. The remedy for a property with widespread old wiring is usually a full or partial rewire.

4. Overheating or damaged consumer units

Loose connections cause resistive heating over time. Visible burn marks or charring at the consumer unit is coded C1 — immediate danger — and the board typically needs urgent replacement.

5. Missing or incorrect earthing

If the main earth conductor is absent, undersized, or incorrectly connected, it undermines the protection provided by all protective devices in the system. Almost always a C2 observation.

6. DIY or non-compliant work

Electrical work carried out by unqualified individuals is a common source of faults — incorrect cable sizing, missing earth connections, non-standard wiring methods. Coded C2 or C1 depending on severity.

What happens next?

If your EICR is unsatisfactory, the report will tell you exactly what needs to be addressed and how urgently. We carry out all remedial work identified in our reports. For a full explanation of what the codes mean, see EICR codes explained.