6 Signs Your Fuse Board Needs Upgrading — A Wrexham Homeowner's Guide

Your fuse board (or consumer unit, if you want the technical name) is the brain of every electrical system in your home. It decides what's safe and what's not — every appliance, every socket, every light. And if yours was installed before the early 2000s, there's a real chance it's no longer up to the job.

We replace consumer units across Wrexham every week. Most of the time, the homeowner had no idea anything was wrong — until something tripped, smelled funny, or stopped working entirely.

Here are the six signs we tell our customers to watch for.

1. Your fuse board still has rewireable fuses

If you open the cover and see ceramic fuse holders with little wire strands inside, your fuse board is at least 30 years old. These were standard in UK homes until the late 1980s but they have no RCD protection — meaning if a fault sends current through a person (you, a child, a tradesperson), the fuse won't necessarily blow in time to prevent a serious shock.

Modern boards have RCDs and RCBOs that trip in under 40 milliseconds. The old fuses don't.

2. Breakers are tripping more often than they used to

A circuit breaker tripping once is normal — that's its job. But if the same breaker trips weekly, or if you're constantly resetting different breakers, something is wearing out. Either the breaker itself is aging, the circuit is overloaded for modern use, or there's an intermittent fault somewhere in the wiring.

We see this most in Wrexham terraces where the kitchen circuit was designed for a 1990s load (one fridge, one kettle, one toaster) and now has to handle a microwave, dishwasher, induction hob and air fryer at the same time.

3. The board is warm to the touch, or you can smell anything off

Your consumer unit should never be warm. If you can feel heat through the front cover, or you smell anything plasticky, burnt or electrical, stop and call an electrician. This is the warning sign we treat as urgent. It usually means a connection has become loose and is arcing internally — which is a fire risk.

4. You have a plastic consumer unit

The 18th Edition wiring regulations (the standard all UK electrical work has to comply with) require new consumer units to be made of non-combustible material — usually steel. This rule came in after a series of house fires caused by overheating plastic boards.

If yours is plastic, it's not automatically dangerous, but it doesn't meet current regs and any decent electrician will recommend an upgrade as part of any larger work.

5. You're adding solar panels, an EV charger, or a heat pump

Anything that adds significant load to your home's electrical system needs to be supported by a board with enough capacity and the right protection. Older boards often don't have a spare way (slot) for a new circuit, and even if they do, they may not have the right RCD setup for an EV charger.

If you're getting solar or a heat pump installed, factor in a fuse board check at the same time — it's cheaper to do both jobs in one visit.

6. You're selling or renting the property

An EICR (Electrical Installation Condition Report) is required for rental properties every five years, and most buyer's solicitors now ask for one before completion. If your fuse board is old or non-compliant, the EICR will flag it as a C2 or C3 — meaning the sale or letting can be held up until it's sorted.

It's much cheaper to upgrade proactively than to renegotiate a sale price.

What's involved in an upgrade?

A standard domestic consumer unit replacement takes us most of a day. We isolate the supply, remove the old board, fit the new one with the appropriate RCBOs for each circuit, test every circuit, and certificate the work (we issue an electrical installation certificate that you keep for your records).

Most upgrades in Wrexham fall in the £450–£750 range depending on the size of the property and the number of circuits. We give a fixed quote before any work starts — no surprises.

When to call us

If any of the six signs above sound familiar, or you just don't know how old your board is and want an honest opinion, get in touch for a free no-pressure assessment. We're Wrexham-based, fully insured, and happy to come out and have a look.

Call us on 07961 876226 or book a callback online.

Need a consumer unit upgrade? Get a free quote from Electrabuild today.