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

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

In the First 10 Minutes

A tripping fuse box is your consumer unit doing exactly what it was designed to do - protecting you and your wiring from a fault. The instinct is to flip the switch back and carry on. Resist that urge until you know why it tripped.

Here is what to do in the first ten minutes:

1. Do not touch anything metal. If you can smell burning or see scorch marks around the consumer unit or any socket, step back from the box entirely and call an electrician immediately.
2. Switch off every appliance in the affected area and unplug them if you can reach them safely.
3. Find your consumer unit - in most Aldershot homes it is in the hallway, under the stairs, or in the kitchen - and identify which breaker has tripped. It will be in the middle position or fully down, depending on the make.
4. Try resetting it by pushing the switch firmly upward. If it holds, switch your appliances back on one at a time until it trips again. That appliance is your culprit.
5. If the breaker will not reset at all, or it trips the moment you flip it, stop. There is a live fault on that circuit and you need a professional.

Never reset a breaker more than twice in quick succession. Each attempt puts additional stress on wiring that may already be damaged.

Within the First Hour

Once you have identified whether you have an appliance fault or a wiring fault, you can make a much better decision about what to do next.

Appliance faults are the most common cause our engineers encounter. A failing washing machine, a faulty kettle, or a defective extension lead can draw excess current and trip your RCD (residual current device) or MCB (miniature circuit breaker). Unplug the suspected appliance and test it somewhere else, or have it checked before using it again.

Wiring faults are more serious. Signs include:

• The breaker trips with nothing plugged in on that circuit
• You have tried multiple appliances and it keeps tripping
• The tripping happens on a specific circuit regardless of load - lights, ring main, or cooker
• You have an older property in Aldershot with wiring that has not been updated in 20 or more years

If it looks like a wiring fault, do not use that circuit. Switch the relevant breaker off and leave it off until an electrician has been. Using a faulty circuit repeatedly can cause wiring to overheat and, in worst cases, start a fire inside the wall.

Also check whether your consumer unit is a modern board with individual MCBs, or an older fuse board with rewirable fuses. Rewirable fuses can be fixed by replacing the fuse wire, but any recurring faults on boards like this are a clear signal that the whole unit may need replacing. Older Hampshire properties tend to have more of these original boards still in service than you might expect.

Same Day

If the fault keeps recurring or you cannot identify the cause, same-day action is the right approach.

What to prepare before an electrician visits:

1. Note down which breaker tripped and what was happening at the time - kettle on, lights flickering beforehand, or nothing unusual at all.
2. Think about whether this has happened before and how often. Once in three years is very different from twice this week.
3. If you have had any recent electrical work done, mention it. Changes to the supply or previous work can sometimes contribute to nuisance tripping.
4. Check the age of your consumer unit if you can. Units installed before 2005 may not have RCD protection on all circuits, which is a safety concern in itself.

When you contact an electrician in Aldershot, be as specific as you can about what happened. A good engineer will ask you these questions before they even arrive. If you use the Voltrade GoFIX diagnostic tool, you can log your symptoms in advance and get a clearer picture of what the likely cause is - it also helps match you with an electrician who has the right test equipment for the job.

For genuine safety concerns - burning smells, visible damage, sparking - do not wait. Call someone now and treat it as an emergency call-out.

The Repair Visit

Here is what typically happens when an electrician arrives to investigate a tripping consumer unit.

Initial inspection comes first. The engineer will check the consumer unit visually, test the RCD and MCBs, and identify whether the fault is in the unit itself or downstream on a circuit. This usually takes 20 to 30 minutes and gives a clear direction for the rest of the visit.

Circuit testing follows if the fault is on a specific circuit. The electrician will use an insulation resistance tester to check the wiring. This involves disconnecting the circuit at the consumer unit and measuring resistance at various points. A low reading indicates a breakdown in the insulation, which is the most common wiring fault our engineers find in older Hampshire properties.

Common findings and typical costs:

• Faulty appliance causing nuisance tripping: the appliance needs replacing or repairing. Electrician call-out and testing typically costs between 80 and 150 pounds.
• Single MCB failing (the breaker itself is worn): replacing one breaker typically costs between 60 and 120 pounds including labour.
• Wiring fault on one circuit (damaged cable, corroded connection): repair costs vary depending on access, but commonly fall between 150 and 400 pounds.
• Consumer unit replacement: if the board is old, lacks RCD protection, or is damaged, a full replacement is the safest outcome. In Aldershot, consumer unit replacements typically cost between 500 and 900 pounds depending on the size of the property and number of circuits.

All electrical work above a certain scope in England must be notified to your local building control authority, or carried out by a registered competent person scheme member who can self-certify the work. Make sure any electrician you hire is registered with NICEIC, NAPIT, or a similar body. Ask for their registration number before they start - any reputable engineer will give it without hesitation.

The repair visit itself typically takes between one and four hours, depending on what is found.

The Following Week

After the repair is done, there are a few things worth doing before you file the paperwork away and forget about it.

Test your RCD. Every consumer unit with RCD protection has a test button - usually labelled "T" on the device itself. Press it once. The RCD should trip instantly. Reset it. Do this every three to six months. Many homeowners in Aldershot never do this and only discover the RCD has failed when something actually goes wrong.

Check your appliances. If a faulty appliance caused the trip, do not simply bin it without investigation. Some faults - particularly in white goods like Hotpoint, Beko, or Bosch machines - are covered by manufacturer recalls or extended warranties. Check the manufacturer website for any active recall notices before you decide to repair or replace it.

Keep a brief log. Note the date of the fault, what caused it, and what work was done. If it happens again within a few months, that log gives the next engineer useful context and may reveal a pattern that is not obvious at first glance.

Make sure you have a copy of any certificates. An electrician who replaces a consumer unit or carries out other notifiable work must issue you with an Electrical Installation Certificate. If you do not receive one, ask for it directly. You will need it if you ever sell the property, and your mortgage lender or insurer may ask for it too.

Long Term

Preventing repeat tripping comes down to understanding the two main causes: overloaded circuits and ageing or damaged wiring. Both are manageable if you stay ahead of them.

Manage your electrical load. Modern homes use far more power than they did when most Aldershot housing stock was originally wired. If you are running high-draw equipment - an electric vehicle charger, a heat pump, a large array of kitchen appliances - off circuits that were designed for much lighter loads, nuisance tripping becomes significantly more likely. An electrician can advise on load balancing or adding dedicated circuits for high-demand equipment.

Get a periodic inspection. An Electrical Installation Condition Report (EICR) is a full inspection of your home's wiring and electrics, carried out by a qualified engineer. For owner-occupied properties, the recommendation is every ten years, though older properties or those with known issues should be done more frequently. Rented properties in England require an EICR every five years by law. An EICR in Aldershot typically costs between 150 and 300 pounds depending on the size of the property.

Consider upgrading your consumer unit. If your board is more than 20 to 25 years old and has never been replaced, it is worth getting a quote for a modern unit with full RCD and RCBO (residual current breaker with overcurrent) protection. Newer units offer better discrimination - meaning one fault on one circuit trips only that circuit, not half the house.

Check cabling age. Wiring has a finite service life. If you have a property with original wiring from the 1960s or 1970s - look for rubber-sheathed or aluminium wiring - it may be approaching the end of its safe working life. An EICR will flag this and give you a prioritised list of any remedial work needed.

Timeline Questions

How long does it take to diagnose a tripping fuse box?

In most cases, an experienced electrician can identify the likely cause within 30 to 60 minutes. Simple faults - a failed MCB, an obvious appliance fault, or a connection that has worked loose - are often found quickly. More complex faults involving wiring buried in walls or intermittent faults that only appear under load can take two to three hours of testing across multiple circuits.

Is a tripping fuse box dangerous?

The tripping itself is not dangerous - it is the protection system doing its job. What can be dangerous is the underlying fault that triggered it. A wiring fault, an overheating appliance, or a failed device can all cause fires or create electric shock hazards. If the breaker trips frequently, or will not stay reset, treat it as a warning and get it looked at promptly rather than ignoring it or resetting it repeatedly and hoping for the best.

Can I replace a tripped breaker myself?

You can reset a tripped breaker yourself - that is fine and expected. Replacing a faulty MCB or making any changes inside the consumer unit is a different matter entirely. Work inside a consumer unit involves direct exposure to live conductors at the service head, which remain live even with the main switch off. This work should only be carried out by a qualified electrician. In England, consumer unit work is also notifiable under Part P of the Building Regulations in most circumstances.

How much does a full consumer unit replacement cost in Aldershot?

Consumer unit replacements in Aldershot typically cost between 500 and 900 pounds for a standard domestic property. The price varies depending on the number of circuits, whether additional work is needed to bring the installation up to current standards, and how accessible the existing cabling is. The job should always include an Electrical Installation Certificate and notification to building control where required - if a quote does not mention these, ask about them directly before you agree to anything.