Why Your Fuse Box Keeps Tripping and What to Do About It in Alton

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

This checklist covers the most common reasons a consumer unit trips - from overloaded circuits and faulty appliances to wiring that's no longer fit for modern electrical loads - and walks you through a clear process for working out what's going on before you decide whether to fix it yourself or call a professional. Staying on top of your electrics is one of the simplest ways to avoid expensive emergency callouts or, worse, a fire caused by a fault that went unnoticed for too long.

Quick Visual Checks Anyone Can Do

Before you call anyone, there's a useful sequence of checks you can run safely without any electrical knowledge. These don't involve touching any wiring - just your consumer unit (the modern name for what most people still call the fuse box) and your appliances.

1. Find your consumer unit. It's usually in a hallway, under the stairs, or in a utility room. Open the cover and look at the row of switches (circuit breakers) inside.
2. Identify the tripped breaker. A tripped breaker will typically be in the middle position or flipped to "off" while the others are all "on". Some units show a red indicator window.
3. Check for a burning smell or scorch marks. If you can smell burning or see any blackening around the consumer unit or a plug socket, stop here and call a qualified electrician. Don't try to reset anything.
4. Switch off everything on that circuit. Before you reset, turn off or unplug every appliance connected to the tripped circuit. If it's a lighting circuit, turn off all light switches on that floor.
5. Reset the breaker. Switch it firmly to "off" first, then back to "on". If it trips again immediately, there's a fault on the circuit or in an appliance. If it holds, switch your appliances back on one at a time.
6. Find the culprit appliance. If the breaker trips when you switch something back on, that appliance is the likely problem. Disconnect it and have it checked before using it again.
7. Check your extension leads. Extension leads running multiple high-draw appliances - electric heaters, kettles, toasters - are a common cause of overloading, particularly in older properties where socket counts are low.

Monthly Maintenance Tasks

A few minutes each month can tell you a lot about the health of your electrics. These checks are easy, cost nothing, and catch problems before they become serious.

Test your RCD button. Your consumer unit almost certainly has at least one RCD (Residual Current Device) - a safety switch designed to cut power instantly if it detects a fault. There'll be a small "test" or "T" button on it. Press it once a month: the switch should trip. If it doesn't trip, or if it trips but won't reset, get an electrician to look at it. This is one of the most important safety checks in any home.

Check extension leads and multi-socket adapters. Look for leads that feel warm to the touch, have damaged cables, or are overloaded with high-wattage appliances. Replace any that look worn. A single double adapter or extension lead shouldn't be running a washing machine and a tumble dryer at the same time.

Inspect your plug sockets. Sockets should sit flush against the wall. If any are loose, cracked, or show signs of heat discolouration around the pins, note them down for an electrician. In Hampshire homes built before the 1990s, our engineers commonly find sockets that haven't been updated to handle the loads of modern appliances - they're often significantly undersized for what's being plugged into them today.

Keep a fault log. If a circuit trips once, keep in mind when and what was plugged in. If it starts happening regularly, that pattern gives an electrician useful information when they come to investigate. A simple note on your phone works fine.

Annual Professional Checks You Should Book

Some things can't be safely checked without proper test equipment and qualifications. These are the checks that a registered electrician should carry out in your home at least once a year.

EICR (Electrical Installation Condition Report). Current guidance recommends homeowners have a full EICR every 10 years, but if your property is older, has had repeated faults, or you've just moved in, it's worth booking one sooner. For a typical three-bedroom house in Alton, an EICR typically costs between 200 and 350 pounds. It gives you a detailed picture of the condition of all your circuits, wiring, and the consumer unit itself, and highlights anything that needs attention before it becomes a problem.

Consumer unit inspection. If your home still has an older fuse board with rewirable fuses rather than modern circuit breakers, an electrician will check whether it needs replacing. A full consumer unit upgrade typically costs between 500 and 900 pounds, including the unit, labour, and certification. It's a significant spend, but an outdated board with no RCD protection is a real safety risk - particularly in older Hampshire properties that haven't had electrical work done in decades.

RCD and breaker testing. A qualified engineer will test each breaker under load conditions to confirm they're tripping at the correct thresholds. The Voltrade GoFIX diagnostic tool, used by engineers on the platform, logs these test results so you get a clear written record of what was checked and when - useful if you're managing a rental property or want documentation for insurance purposes.

Meter tails and earthing checks. The cables between your meter and consumer unit are called meter tails. They're not something homeowners can inspect themselves, but an electrician can check they're properly rated and connected. Earthing and bonding connections to gas and water pipes are also checked as part of this process, and failures here are commonly flagged in older homes.

Warning Signs That Need Immediate Attention

Some electrical problems can't wait for a routine appointment. If you notice any of the following in your Alton home, treat it as urgent and contact a qualified electrician the same day.

• Burning smell from the consumer unit or a socket - this can indicate arcing or overheating, both of which are fire risks
• A breaker that won't stay reset - if it trips immediately every time you try to reset it, there's a live fault on that circuit that needs diagnosing before you use it
• Sparking from a socket or switch - a tiny spark occasionally when plugging something in can be normal, but sustained or repeated sparking is not
• Multiple circuits tripping at the same time - this is unusual and often points to a problem with the main supply or the consumer unit itself rather than a single appliance
• Scorch marks or discolouration - any visible burning around sockets, switches, or the consumer unit needs professional attention immediately
• Flickering or dimming lights - especially if it happens across multiple rooms or at the same time each day, this can point to a loose connection or a problem with the supply voltage
• A tripping circuit you can't identify - if you've unplugged everything on a circuit and the breaker still won't hold, there's a wiring fault somewhere and it needs to stay off until it's been investigated

If you're ever in doubt, switch off the affected circuit at the consumer unit and don't use it until it's been checked. Emergency electrical callouts in the Alton area typically cost between 100 and 200 pounds depending on the time of day, but that's a small price compared to leaving a live fault unattended.

Your Maintenance Schedule

Here's a simple calendar to keep your electrics in good shape throughout the year. Print it out and put it inside your consumer unit cover if it helps.

Every month

• Test the RCD button on your consumer unit
• Check extension leads for damage or overloading
• Look around sockets and switches for any visible changes
• Log any tripping events with date, time, and what was running

Every 6 months

• Review your fault log - if any circuit has tripped more than twice, book an inspection
• Check outdoor sockets and any cables running externally for weather damage
• Test smoke and carbon monoxide detectors and replace batteries if needed
• Check that cables behind furniture or under rugs aren't being pinched or damaged

Every year

• Book an annual electrical inspection with a registered electrician
• Have any appliance assessed that has caused repeated tripping - common culprits include older washing machines, dishwashers, and electric showers
• Check the condition of the consumer unit visually for rust, water ingress, or a loose cover

Every 5 to 10 years

• Commission a full EICR
• Consider a consumer unit upgrade if your board is more than 25 years old
• Review whether your circuit capacity still matches your usage - most homes today run significantly more electrical load than when they were built, particularly with EV chargers and heat pumps becoming more common in Hampshire properties

Checklist Questions

Why does my fuse box keep tripping even after I've reset it?

If a circuit breaker trips repeatedly, there's almost always an underlying fault rather than a one-off overload. The most common causes are a faulty appliance drawing too much current, a damaged cable with a partial short circuit, or an overloaded circuit that's simply got too many appliances running at once. Our engineers in Alton commonly find that kitchens are the worst offenders - dishwashers, microwaves, and electric ovens sharing the same circuit will cause tripping under load. Start by unplugging everything on that circuit and resetting. If it holds, add appliances back one at a time to find the culprit. If it trips with nothing connected at all, there's a wiring fault and you need a qualified electrician to investigate before using that circuit again.

How much does it cost to replace a fuse box in the UK?

A consumer unit replacement in a typical UK home typically costs between 500 and 900 pounds, though this varies depending on the size of the property, the number of circuits, and the accessibility of the existing unit. The price should always include a minor works or full installation certificate from a registered electrician - if a quote doesn't mention certification, ask about it specifically. Larger properties or those needing additional work to bring circuits up to current regulations may cost more. It's worth getting two or three quotes before committing, and always check that the engineer is registered with NICEIC, NAPIT, or a similar competent person scheme.

Is it safe to reset my fuse box myself?

Resetting a tripped circuit breaker is generally safe, provided you follow the right process. Switch off or unplug all appliances on that circuit first, then reset the breaker by switching it to "off" before pushing it firmly back to "on". If it trips again immediately with nothing connected, don't keep resetting it - there's a fault on the circuit that needs professional diagnosis. You should never try to reset a breaker that shows scorch marks, smells of burning, or is physically damaged. And if your property still has the older style rewirable fuses rather than circuit breakers, leave any work on those entirely to a qualified electrician rather than attempting to replace the fuse wire yourself.