Power Cut at Home What to Do Step by Step in Aylesbury

Published October 2026 | Power cut at home what to do step by step

It's a Sunday evening in Aylesbury and you're halfway through cooking dinner when every light in the house goes off at once. The TV cuts out, the fridge stops humming, and you're standing in the dark wondering whether this is your problem to fix or something happening down the street. That moment of uncertainty is exactly what this guide is for.

Understanding What's Actually Happening

When you lose power at home, there are two completely different situations that could be at play. Either the electricity supply from the local distribution network has failed - meaning your whole street or neighbourhood is affected - or there's a fault inside your own property. These two scenarios have different causes, different solutions, and different people responsible for sorting them out.

A power cut that affects only your home almost always points to an internal fault. Your consumer unit (the modern name for a fuse box) is designed to trip and cut power when it detects something dangerous - an overloaded circuit, a short circuit, or a faulty appliance drawing too much current. This is the protection system working exactly as it should. The challenge is knowing where to start when you're standing in a dark hallway with no idea which switch has gone or why.

External faults - the ones on the network itself - are the responsibility of your Distribution Network Operator (DNO). You don't own the cables in the street, the substation at the end of the road, or anything between the national grid and your electricity meter. If something fails out there, it's the DNO's job to fix it, not yours. (elec-mate.com)

The Most Common Causes of a Power Cut at Home

Before you can fix the problem, you need to know what caused it. Our engineers see a handful of causes come up again and again, and knowing which one you're dealing with shapes everything that comes next.

A Tripped Circuit Breaker or RCD

The most common cause of sudden total power loss inside a single property is a tripped RCD (residual current device) or MCB (miniature circuit breaker) in your consumer unit. Your consumer unit typically lives in a cupboard under the stairs, in the hallway, or sometimes in a garage or utility room.

When an RCD trips, it cuts power to a circuit - or sometimes an entire section of the board - in under 40 milliseconds. It's protecting you from a potentially dangerous earth fault. Modern homes in Buckinghamshire are almost all fitted with consumer units that contain rows of plastic switches, so a tripped device is easy to spot: it'll be in the middle or "off" position while everything else sits upright.

A Faulty or Overloaded Appliance

Plugging in a faulty appliance is one of the most common triggers our engineers encounter. A washing machine with a failing motor, a kettle with a damaged element, a tumble dryer whose heating element has developed an earth fault - any of these can draw enough current to trip your RCD the moment you switch them on. If the power goes off instantly when you plug something in or turn a specific appliance on, that's a strong clue the problem lies with that device rather than your wiring. Extension leads with too many high-draw appliances connected can also overload a circuit and trip an MCB.

A Wiring Fault Inside Your Property

Older properties in Aylesbury - and there are plenty of Victorian and Edwardian terraces across the town - can develop wiring faults over time. Loose connections at sockets or light fittings, degraded cable insulation, or electrical work carried out by previous owners without the right expertise can all create faults that only appear under load. These are typically harder to diagnose without test equipment and usually need a qualified electrician to track down. Intermittent faults - where the power comes back on its own and then trips again - are particularly worth taking seriously, as they can indicate arcing at a loose connection, which is a fire risk.

A Fault on the Local Network

If your neighbours are also without power, or if the street lighting has gone off, the problem almost certainly isn't inside your home at all. This is a DNO fault. In Buckinghamshire, the DNO responsible for the cables, substations, and infrastructure that deliver electricity to your street is UK Power Networks.

You can report a network outage and check for known faults by calling 105 - the free, national number for power cut emergencies that works from any mobile or landline. (selectra.co.uk) You'll be connected to your local DNO automatically. In this situation, there's nothing to do inside your property - just report it and wait for the repair crew.

Solutions That Actually Work

Work through these steps in order. Don't skip ahead and don't start pulling switches at random.

1. Check your neighbours first. Look out of the window. Are their lights on? Is the street lit? If the surrounding area is dark, call 105, report the outage, and sit tight. You don't need to go near your consumer unit.
2. Get a torch before you do anything else. Your consumer unit may be in a dark cupboard, and you need both hands free to look at it properly. Your phone torch is fine.
3. Find your consumer unit and open the cover. Look at every switch inside. You're looking for a switch in the middle position, visibly flipped down, or clearly different from the rest. In some units, a tripped RCD may have a small red indicator showing.
4. Identify what type of device has tripped. MCBs protect individual circuits - you might have separate ones for upstairs lights, downstairs sockets, the cooker, the shower, and so on. RCDs protect groups of MCBs from earth faults and are usually wider switches. If your RCD has tripped, it can cut power to half or all of your home at once.
5. Try resetting the tripped switch. Push it firmly back to the "on" position. If it resets and stays on, your problem may be solved - but make sure you find out what caused it to trip in the first place, because it'll happen again if you don't. (elec-mate.com)
6. If the switch immediately trips again, stop. Do not keep forcing it back. There's an active fault on that circuit. Repeatedly resetting a tripped protective device against a live fault is dangerous and won't fix anything.
7. Unplug everything on the affected circuit. Go around the house and unplug every appliance connected to the circuit that tripped. Then try resetting the switch again. If it holds now, plug appliances back in one at a time, waiting ten seconds between each. When the power trips again, you've found the faulty appliance. Set it aside and don't use it until it's been checked.
8. If the switch still won't hold with nothing plugged in, call an electrician. The fault is in the fixed wiring - a cable, a socket, a light fitting - and that needs professional diagnosis and repair.
9. If everything looks normal in the consumer unit but you still have no power, check your meter. If the meter is completely dead, the fault is between the meter and the street, which is the DNO's territory. Call 105.

When You Need Professional Help vs Sorting It Yourself

Resetting a tripped MCB or RCD after unplugging a faulty appliance is well within most homeowners' abilities. You don't need any specialist tools or electrical training to do that part safely, and it solves the majority of power cut call-outs our engineers attend.

But there are situations where you need a registered electrician, and trying to push past them yourself creates real risk. Call a professional if any of the following apply:

• The RCD or MCB trips repeatedly even with all appliances unplugged
• You can smell burning from a socket, light fitting, or the consumer unit itself
• You can see scorch marks or discolouration anywhere near your wiring or sockets
• Your consumer unit is old and contains rewireable fuses (porcelain fuse carriers with wire across them) rather than modern MCBs
• You have partial power loss - some rooms working, others not - without an obvious tripped switch
• The power cuts out and comes back on its own, repeatedly, over hours or days
• The power went off during or after recent building work or DIY in the house

That last scenario around intermittent faults is worth highlighting. A connection that's loose enough to arc and then re-make contact can cause the power to behave erratically without producing a clear, sustained trip. It can also cause a fire. If your power has been unreliable in that way, treat it as urgent.

Our engineers use the Voltrade GoFIX diagnostic process to work through these faults methodically - starting at the consumer unit and working out through each circuit - so nothing gets missed and you're not paying for guesswork.

What to Expect from a Repair Visit

When a qualified electrician comes to investigate a power cut in your Aylesbury home, the visit will start with a conversation. What happened just before the power went off? Was it sudden or gradual? Did anything new get plugged in? That context saves time and often points directly to the fault before a single test is run.

From there, the engineer will check the consumer unit, look at the condition of the wiring inside it, and use test equipment - a multimeter, an insulation resistance tester, or a loop impedance tester - to work through the circuits systematically. If the fault is a faulty appliance, that's usually a quick diagnosis. If it's a wiring fault - a damaged cable inside a wall, a loose connection at a back box, corroded contacts in an old socket - the investigation takes longer and the repair may involve opening up the wall or lifting floorboards to access the cable.

For a standard fault-finding visit in Buckinghamshire, you should budget somewhere in the region of 80 to 150 pounds for the call-out and first hour of diagnostic work. If a repair is needed - replacing a socket, repairing a damaged cable run, or renewing a section of circuit - costs typically range from 150 to 400 pounds depending on the complexity. A full consumer unit replacement in a typical Aylesbury property commonly costs between 500 and 900 pounds including parts and labour, though the exact figure depends on the size of your installation and what's being like-for-like replaced versus upgraded.

Any reputable electrician will give you a written quote before starting work. Don't let anyone begin a repair without one. All work on your home's fixed wiring should be carried out by a qualified electrician registered with a recognised competent person scheme such as NICEIC or NAPIT, which ensures the work meets BS 7671, the UK wiring regulations.

Common Questions from Aylesbury Homeowners

How do I know if it's just my house or the whole street that's lost power?

Look out of your window and check whether your neighbours' lights are on. If the street lights are also out, it's almost certainly a network fault rather than an internal one. You can also call 105 - the free national power cut helpline, available 24 hours a day - to report the outage and check whether your DNO already knows about it. (selectra.co.uk) If it is a network fault, there's nothing to do inside your home - you won't need to touch your consumer unit at all.

Is it safe to reset my consumer unit myself?

Yes, resetting a tripped MCB or RCD is safe provided you follow the right steps. Unplug all appliances on the affected circuit first, then try resetting the switch. If it holds, plug things back in one at a time to find the culprit. If the switch trips again immediately even with nothing connected, stop and call a qualified electrician. (elec-mate.com) There's an active fault on that circuit that needs professional diagnosis, and pushing past the protection device won't fix it.

How long will food in my fridge and freezer stay safe during a power cut?

A closed fridge will typically keep food at a safe temperature for around four hours after power is lost - provided you keep the door shut. A full freezer can hold its temperature for 24 to 48 hours, while a half-full freezer manages closer to 24 hours. Keep the doors closed as much as possible throughout the outage. If you know the cut is going to last longer than four hours and can't transfer perishables to a neighbour's fridge, you may need to discard some items. Do not refreeze food that has fully thawed.

Am I entitled to compensation if my power cut goes on for a long time?

If your power is off for more than 12 hours due to a network fault - not an internal fault inside your home - you may be entitled to compensation from your DNO under the guaranteed standards of performance. Payments typically start at around 30 pounds for a 12-hour interruption and increase for longer outages, with higher rates applying in severe weather events. Contact your DNO directly after power is restored to make a claim. (selectra.co.uk) Keep a note of when the power went off and when it came back on.