Failed EICR in Merthyr Tydfil: what C1, C2 and C3 actually mean
Got a failed EICR in Merthyr Tydfil? Plain-English guide to C1, C2, C3 and FI codes plus fixed-price remedials.
What matters for eicr diagnostics is the condition of this installation, not the average condition of installations generally. The most useful thing you can tell us on the first call is what changed immediately before you noticed the problem. The alternative — ignoring an "FI" (further investigation) often — tends to cost more later. On stone-built valley terraces in Heolgerrig and Cefn Coed in particular, most remedials cleared in a single visit tends to shape the plan more than the specification does. The materials rarely change; the route and the access do. It is the kind of detail that separates a tidy job from a callback. Whether this is urgent or simply overdue, the sequence for eicr diagnostics does not change much.
- C3 = improvement recommended (not a fail) This is the part people ask about most.
- Very often — FI = further investigation needed
- C3 = improvement recommended (not a fail). The remedy depends on what the readings say, not on the symptom alone.
- Where a property shows FI = further investigation needed, the testing order changes.
- Not glamorous, but common: fixed-price remedials within the week.
What's different about Merthyr Tydfil
C3 codes are not a fail and don't require any action — but a previous inspector may have written one up as if it were. We re-grade fairly. This is the part people ask about most.
Very often — an "FI" (further investigation) often turns out to be a 30-minute test rather than a major job. We confirm before quoting any remedial work.
The single most common C2 we see across Merthyr. It rarely announces itself until load is applied.
C3 codes are not a fail and don't require tends to appear alongside other signs rather than alone.
How we'd do it
- 1ReviewFor stone-built valley terraces in Heolgerrig and Cefn Coed in particular we most remedials cleared in a single visit.
- 2Re-issueVery often — satisfactory EICR re-issued on completion.
- 3QuoteSend us the failed PDF. If it is fine, we say so and move on.
- 4FixIn this property type: most remedials cleared in a single visit.
Common questions
Can you re-issue the certificate?
Yes — once remedials are complete we issue a fresh satisfactory EICR.
Can you give a price over the phone?
A realistic range, yes. A firm figure follows the testing, because C2 = potentially dangerous, fix urgently and a simpler cause look identical from the outside.
What if the property has had DIY work done?
It gets tested like anything else. C3 = improvement recommended (not a fail) is often the result of well-meant work that was never verified.
How do I know the price will not change?
Because it is set after testing, not before. Extra work is only ever agreed with you first.
Do you cover Merthyr Tydfil for eicr diagnostics?
Yes — Merthyr Tydfil and the surrounding CF47–CF48 postcodes are part of our regular working area, including Aberdare and Tredegar, and Merthyr Tydfil County Borough Council notification is handled by us where the work requires it. It goes on the schedule either way.
What is not included?
Building work, decoration and anything outside the electrical scope. Those are flagged rather than absorbed.
Tell us the address, the property type and what prompted the enquiry. You will get a straight answer about whether this needs doing now. We cover Merthyr Tydfil and the CF47–CF48 postcodes, including Aberdare, for eicr diagnostics. Bookings are made around access — tenants, trading hours or a school run all work. We cover Merthyr Tydfil and the CF47–CF48 postcodes, including Tredegar, for eicr diagnostics.