Same-day attendance

Electric shower tripping the electrics — Cardiff diagnostic visit

The intention of this page is to save you a wasted visit, not to create one. Where a smaller repair solves it, that is what gets quoted.

There is a short version and a long version of electric shower tripping the electrics. The short version: test it, then decide. If your electric shower tripping the electrics in Cardiff, the honest answer is that you don't need a rewire and you probably don't need a new consumer unit — you need a proper diagnosis. Where previous work has no certification behind it, we test it rather than take it on trust. That is checked with instruments, not by eye.

We attend Cardiff calls from a base that reaches the A470 and A48 within minutes. Questions asked during the visit get answered during the visit; there is no benefit to either of us in keeping it mysterious. That detail is what a proper survey is for. Before booking electric shower tripping the electrics anywhere in Cardiff Council, it is worth knowing which parts of the job are fixed and which depend on your property.

Likely causes

A failed heating element leaking to earth — the classic end-of-life shower fault at 6–8 years.
The shower cable undersized for the kW rating, overheating under load.
A shared RCD tripping when the shower's own tiny leakage adds to the rest of the circuits.
A corroded connection at the shower unit terminal block from years of steam.

Safe checks you can do first

Turn the shower off at its pull-cord and try running only cold — does the breaker still trip?
Check the shower's kW rating vs the cable size stamped on the sheath.
Note age of shower — 8+ years and it's often end-of-life regardless.

When to stop and call

If the breaker trips as soon as the shower is switched on, or if there's any smell of burning near the unit.

How we fix it

We insulation-test the shower circuit, confirm whether the fault is the appliance or the wiring, and either replace the shower unit (matching kW and cable) or upgrade the cable and RCBO to suit a higher-kW replacement.

Typical price: £140–£220 for diagnosis + shower replacement. Cable upsize quoted separately if needed.

FAQs — electric shower tripping the electrics in Cardiff

Can I just fit a stronger shower myself?+

No — a higher kW shower usually needs a bigger cable and matched RCBO. Fitting a 10.5kW on a 9.5kW cable is a fire risk.

How long does replacement take?+

A like-for-like shower swap is usually 90 minutes to 2 hours.

Cardiff context

If the breaker trips as soon as the shower is switched on, or if there's any smell of burning near the unit. Work in Cardiff is planned so that the disruptive part is as short as it can reasonably be. That is one reason our price does not move after the survey.

Start with a survey — Electric shower tripping the electrics in Cardiff

Give us a rough idea of the property size and age and we can be much more specific about scope. We cover Cardiff and the CF10–CF24 postcodes, including Pontypridd, for electric shower tripping the electrics. Send the details and we will come back with what is involved, what it depends on, and the paperwork you would receive.

Call 07949 398 752 Request a quote

In summary

Electric shower tripping the electrics in Cardiff — findings recorded, scope agreed before work starts, no open-ended hourly billing. You are welcome to watch the tests being taken and ask what each one means. We keep the certificate on file, so a replacement copy is a phone call away.