Why Your Fuse Box Keeps Tripping and How to Fix It in Accrington

Published September 2026 | Why your fuse box keeps tripping and how to fix it

What Causes a Fuse Box to Keep Tripping

Your consumer unit - what most people still call the fuse box - is designed to cut power the moment something goes wrong. That's not a fault; that's the system doing exactly what it should. The problem is when it keeps happening, because that tells you something isn't right on one or more of your circuits.

Our engineers in Accrington see a handful of causes come up again and again.

Overloaded circuits

This is the most common reason a circuit breaker trips. Every circuit in your home has a maximum load it can safely carry, measured in amps. When too many appliances draw power at the same time - an electric heater, a kettle, a microwave, and a toaster all on the same ring main, for instance - the total current exceeds what the breaker is rated for and it trips to protect the wiring.

Kitchen circuits are particularly prone to this. Modern kitchens pack in more high-wattage appliances than ever, and older homes in Accrington often have wiring that was installed long before electric showers, induction hobs, and air fryers became standard.

Faulty appliances causing a short circuit

A short circuit happens when a live wire touches a neutral wire, either inside an appliance or somewhere in the fixed wiring. This creates a sudden, massive surge of current that trips the breaker almost instantly - usually with a loud click or a brief flash.

A short circuit in an appliance is one of the easier faults to identify. If the breaker trips the moment you plug something in or switch it on, that appliance is the likely culprit. Washing machines, tumble dryers, dishwashers, and electric cookers are the appliances our electricians flag most often for this kind of fault, though any device can develop it over time.

Earth leakage detected by the RCD

RCDs - residual current devices - are the switches on your consumer unit that typically have a small "T" test button. They monitor the balance of current flowing in and out of a circuit. If they detect even a small amount of current leaking to earth, they trip in milliseconds to prevent electrocution or fire.

RCD trips are more sensitive than standard circuit breaker trips. A damp appliance, deteriorating cable insulation, or a faulty socket can all generate enough leakage to set one off. If your RCD keeps tripping even when there's apparently nothing wrong, there's almost certainly a fault somewhere on that circuit - it just might not be obvious from the outside.

Ageing wiring and consumer units

Many homes across Lancashire were built decades ago, and the wiring hasn't always been updated to match modern demands. Old rubber-insulated cables, worn connections at junction boxes, and deteriorating consumer units can all cause intermittent tripping that gets progressively worse. If your home still has a rewirable fuse box with ceramic fuses rather than modern circuit breakers and RCDs, that's a clear sign the installation needs professional attention.

How to Diagnose a Tripping Fuse Box Step by Step

Before you call an electrician, it's worth doing some basic diagnosis. You can safely do this yourself - you won't be exposed to live parts during this process as long as you don't remove the cover of the consumer unit itself.

1. Note which breaker has tripped. When a breaker trips it moves to the middle or off position. Check your consumer unit and identify which one has moved. It should be labelled - "kitchen ring," "upstairs lighting," and so on. If it isn't labelled, take this opportunity to map out which rooms go off when you switch each breaker individually.
2. Switch off all appliances on that circuit. Go around the affected area and turn everything off at the wall or unplug it. Don't just leave appliances on standby - switch them off fully or remove them from the socket.
3. Reset the breaker. Push it firmly back to the on position. If it trips immediately with nothing connected, the fault is in the fixed wiring itself - that means calling a professional.
4. Reconnect appliances one at a time. If the breaker holds with everything disconnected, plug appliances back in one by one and switch them on. When the breaker trips again, the last appliance you connected is the most likely cause.
5. Test the suspect appliance on a different circuit. If you can, plug that appliance into a socket on a different circuit. If it trips that breaker too, you've confirmed the appliance is faulty. Stop using it until it's been inspected or replaced.
6. Check for overloading. If no single appliance causes the trip but the breaker goes when several things are running together, you've likely got an overloaded circuit. Spreading the load across circuits - or having an additional circuit installed - will solve it.

If you've worked through these steps and can't pin down the fault, or if the breaker trips with nothing at all connected, use the Voltrade GoFIX diagnostic tool to describe the symptoms. It helps our electricians in Accrington understand the nature of the fault before they arrive, which typically means a faster and more targeted fix.

DIY vs Professional - Knowing Where to Draw the Line

There's quite a lot you can safely do yourself when a fuse box trips. Unplugging appliances, resetting breakers, and identifying a faulty device are all within the scope of any competent homeowner. What you must not do is open the consumer unit cover, attempt to replace circuit breakers, or carry out any work on the fixed wiring in your home.

In England and Wales, most significant electrical work is notifiable under Part P of the Building Regulations. This means it must either be carried out by a qualified electrician registered with a competent person scheme - such as NICEIC or NAPIT - or it must be inspected and certified by Building Control. In Accrington, as elsewhere in Lancashire, this applies to any work on consumer units and most wiring in kitchens and bathrooms.

When you can handle it yourself

• A single appliance is causing the trip - replace or get the appliance repaired
• You've overloaded a circuit - redistribute the load or stop running several high-wattage appliances simultaneously
• The breaker tripped once after a power surge and hasn't done so again

When you need a qualified electrician

• The breaker trips repeatedly with no obvious cause
• The breaker trips with nothing at all connected on that circuit
• You can smell burning or see scorch marks near sockets, cables, or the consumer unit itself
• Multiple circuits are tripping at the same time
• Your home has old wiring or an outdated fuse box
• Any work needs to be done inside the consumer unit

What a Qualified Electrician Will Do

When one of our electricians visits a property in Accrington with a persistently tripping fuse box, they follow a systematic process to locate and fix the fault safely and correctly.

Initial assessment

The engineer will start by asking you to describe when the tripping happens, which circuit is affected, whether it's getting worse over time, and whether you've noticed anything unusual - smells, flickering lights, sparking sockets. This information shapes where they look first and narrows down the type of fault.

Insulation resistance testing

Using specialist test equipment, the engineer checks the insulation resistance of the wiring on the affected circuit. Degraded cable insulation is one of the most common causes of RCD tripping that homeowners can't detect visually. This test picks up faults that aren't visible to the eye and gives the engineer a clear picture of the cable's condition.

Earth loop impedance testing

This checks whether the earthing in your property is working correctly. A poor earth connection can cause a range of problems, including nuisance tripping, and it's a serious safety issue in its own right. Many older installations in Accrington have earthing arrangements that don't meet current standards.

Appliance testing and consumer unit inspection

If there's any doubt about a specific appliance, the engineer can carry out a portable appliance test on site. They'll also inspect the consumer unit itself for signs of wear, loose connections, incorrect fusing, or moisture ingress. In some cases - particularly in older properties - the consumer unit itself is the root of the problem, and a replacement is the correct and safest course of action.

Certification

Any remedial work the engineer carries out will be accompanied by the appropriate certification - a Minor Works Certificate for smaller jobs, or an Electrical Installation Certificate for larger work. You'll need this for insurance purposes and when you come to sell the property.

Costs and What Affects the Price

Electrical call-out costs in Accrington typically fall in a similar range to the rest of the UK, though rates vary depending on the complexity of the job and the engineer's experience and registration body.

For a diagnostic visit to identify the cause of a tripping fuse box, expect to pay in the region of 80 to 150 pounds for the first hour. Some electricians charge a flat call-out fee of around 60 to 100 pounds and then an hourly rate on top. If the fault turns out to be a single faulty appliance that doesn't require any wiring work, the diagnostic visit is likely all you'll need to pay for.

For more involved work, typical costs currently run as follows:

• Replacing an individual circuit breaker: typically 50 to 150 pounds including parts and labour
• Installing an additional circuit: commonly 200 to 500 pounds depending on cable length and accessibility
• Replacing a full consumer unit: typically 500 to 1,000 pounds for a standard domestic installation, though properties with larger or more complex installations will cost more
• Full house rewire: commonly 3,000 to 8,000 pounds or more depending on property size - a three-bedroom semi in Accrington might fall towards the lower end of that range

Material costs have risen significantly over the past couple of years, so always get a written quote before any work begins. Any reputable, registered electrician will provide one without hesitation.

How to Prevent Your Fuse Box from Tripping in Future

Most tripping consumer units are preventable with a few sensible habits and some basic maintenance.

Don't overload your circuits. Before you add an appliance to a circuit, think about what's already running on it. High-wattage appliances - electric heaters, kettle, tumble dryer, electric shower - each draw a significant amount of current. Running two or three of them from the same ring main simultaneously is the single most common cause of tripping that our engineers see in Accrington.

Replace old and damaged appliances before they become a problem. A washing machine or dishwasher that's 12 to 15 years old and starting to trip the RCD has likely developed a fault in its wiring or heating element. Continuing to use it risks repeated trips and, potentially, a more serious fault.

Have your installation inspected regularly. The recommended interval for an Electrical Installation Condition Report (EICR) in a private home is every ten years, or whenever the property changes occupancy. An EICR will identify deteriorating cables, poor connections, and out-of-date equipment before they cause problems - and it's a requirement many home insurers now ask about.

Fit surge protection. A whole-house surge protector installed at the consumer unit protects your appliances from voltage spikes coming in from the mains. These spikes can cause nuisance tripping and, in some cases, permanent damage to expensive electronics.

Keep moisture away from electrical fittings. Outdoor sockets, bathroom fittings, and sockets near kitchen sinks are particularly vulnerable to moisture ingress, which is a very common cause of RCD trips. Make sure any external fittings are rated for outdoor use, and check that bathroom fittings comply with the IP ratings required for the zones they're installed in.

Frequently Asked Questions

Why does my fuse box keep tripping at night?

Night-time tripping is most commonly caused by appliances that run on timers - dishwashers set to run after midnight, washing machines on a delayed programme, or immersion heaters on Economy 7 tariffs switching on in the early hours. Try running each of these appliances during the day to see which one triggers the trip. If that doesn't identify the fault, get a qualified electrician to test that circuit properly.

Is it safe to keep resetting a tripping circuit breaker?

Resetting a breaker once or twice to investigate the fault is fine. But repeatedly resetting one that keeps tripping is not safe - you're forcing power through a circuit that has an active fault, and you're putting extra mechanical stress on the breaker itself. A breaker that keeps tripping is telling you something is wrong. Find the fault first, then reset it for good.

Can a faulty light fitting cause my RCD to trip?

Yes, absolutely. A damaged lamp, a fitting with deteriorating insulation, or moisture inside a bathroom light fitting can all cause enough current leakage to trip an RCD. If your lighting circuit is causing trips, try switching off individual lights until the tripping stops - that points you to the suspect fitting. A qualified electrician can then test and replace it safely.

How do I know if I need a new consumer unit rather than just a repair?

If your consumer unit is more than 25 years old, doesn't have RCD protection on all circuits, or your electrician finds evidence of overheating, water damage, or deterioration inside, replacement is usually the safer and more economical choice long term. Modern consumer units with full RCD and AFDD protection offer considerably better safety for your home than older units with partial protection.

How quickly can an electrician in Accrington come out for a tripping fuse box?

For a tripping fuse box where you've lost power to part of your home, most registered electricians treat it as an urgent job and can typically attend within 24 to 48 hours. For emergency call-outs - complete loss of power or signs of a serious fault like burning smells or scorch marks - same-day attendance is usually possible, though emergency rates will apply on top of the standard call-out fee.