What to Do If Your Fuse Box Keeps Tripping?

A fuse box that keeps tripping is a sign that something on your electrical circuit needs attention. In many cases it’s straightforward to identify and resolve yourself. Here’s what to do, step by step.

Why does a fuse box trip?

A fuse box, or consumer unit, trips when it detects a problem on the circuit. It’s a safety mechanism designed to cut power before the issue causes damage or a fire. There are three common causes:

• Overloaded circuit: Too many high-power appliances running on the same circuit at once. Kettles, toasters, microwaves, and heaters are frequent culprits.
• Faulty appliance: A single appliance with a fault, such as a worn-out element or damaged cable, can cause the circuit to trip every time it’s switched on.
• Wiring issues: Older properties sometimes have ageing wiring that can’t cope with modern electrical demand. This is more likely to need a professional assessment.

How to fix a tripping fuse box?

Work through these steps before calling an electrician.

Step 1: Unplug all appliances. Before resetting anything, unplug every appliance connected to the circuit. Kitchen appliances, lamps, televisions, phone chargers, all of them. This reduces the load and helps you identify whether a specific appliance is causing the problem.

Step 2: Reset the consumer unit. Find your consumer unit, typically located in a hallway, under the stairs, or in a cupboard. Flip all the individual circuit breakers to the off position, then switch the main power switch back on. Turn the circuit breakers back on one at a time. If they all reset without tripping, the issue may have been a one-off surge.

Step 3: Identify the problem circuit. If a circuit breaker trips again when you switch it on, that circuit has a fault. Note which circuit it is, as this tells you which part of the house or which group of appliances to investigate.

Step 4: Plug appliances back in one at a time. Once you’ve identified the problem circuit, plug appliances back into it one at a time and switch them on. If the circuit trips when you plug in a specific appliance, that appliance is the likely cause. Leave it unplugged and contact a repair service or replace it.

Step 5: Call a qualified electrician if the problem persists. If the fuse box keeps tripping even with everything unplugged, or if the main switch won’t stay on, don’t keep resetting it. Call a qualified electrician to diagnose the issue. Wiring faults, damaged consumer units, and issues with the incoming supply all require a professional to fix safely. Our guide on how to reduce the risk of electrical fires covers the signs that your electrics need professional attention.

What to do if you’re renting

If you’re a tenant, electrical maintenance is your landlord’s responsibility. Report the problem to your landlord or letting agent in writing as soon as possible. Include:

• A description of what’s happening and how often it’s occurring
• What you’ve already tried
• Photos of the consumer unit if relevant

Don’t attempt to carry out any repairs yourself. Document the issue clearly so your landlord or their electrician has the information they need to diagnose and fix it promptly. Here’s how long landlords have to fix problems, and what response times you can reasonably expect.

Does insurance cover electrical damage?

If a tripped circuit or electrical fault has damaged appliances or other belongings, your contents insurance may cover the cost of replacing them.

With Lemonade’s contents insurance, damage to your belongings from sudden electrical faults may be covered depending on the cause and your policy. Check your policy documents to confirm what’s included. If the electrical problem has caused a fire, our guide on does contents insurance cover fire damage explains how those claims are assessed.

For damage to the electrical installation itself, such as the consumer unit or wiring, that falls under buildings insurance rather than contents.

How to prevent your fuse box from tripping

A few habits help reduce the risk of repeated trips:

• Avoid overloading sockets. Don’t run multiple high-power appliances from the same circuit at the same time.
• Check appliances regularly. Worn cables, damaged plugs, or appliances that spark or trip the fuse when switched on should be repaired or replaced promptly.
• Get your wiring checked periodically. For older properties, having a qualified electrician carry out an Electrical Installation Condition Report (EICR) every ten years is recommended. Landlords are legally required to have one carried out every five years.

Before we go

A repeatedly tripping fuse box is worth taking seriously, but it’s usually straightforward to diagnose with a methodical approach. Unplug everything, reset the consumer unit, and plug appliances back in one at a time to find the cause. If you can’t resolve it yourself, call a qualified electrician rather than repeatedly resetting the switch.

And if electrical damage has affected your belongings, it’s worth checking whether your contents insurance covers it. 

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