Winter warning signs: is your home's electrical system feeling the strain?
Winter puts more strain on your home's electrics than any other time of year. The heating's on, the lights are on for longer, plug-in heaters come out of the cupboard, and the weather outside is cold and wet.
It all adds up, and winter is often when faults that have been building quietly finally show themselves.
The good news is that most electrical faults give you a warning first. Here are the signs our electricians look out for, what you can safely do yourself, and when it's time to get it checked.
In This Guide
1. Overloaded sockets and extension leads
A standard UK extension lead can safely handle up to 13 amps in total, around 3,000 watts. A single plug-in heater can use most of that on its own, so adding a kettle, a tumble dryer or another heater to the same lead can quickly overload it.
Signs a socket or lead is overloaded:
- The plug, lead or socket feels warm
- A burning smell, or brown marks around the socket
- The fuse in the plug keeps blowing
How to avoid it:
- Plug heaters, kettles and tumble dryers straight into a wall socket, never into an extension lead
- Don't plug one extension lead into another
- Fully unwind cable reels before use, as coiled cables can overheat
Electric blankets are worth a closer look. Electrical Safety First reported in March 2026 that accidental electric blanket fires rose by 24% year-on-year, so check yours for worn fabric, scorch marks or damaged wires before you plug it in.
If a socket feels warm or looks scorched, stop using it and get it checked. Our electricians can repair or replace it with our plug socket repairs service.
2. Flickering or dimming lights
With the lights on for longer in winter, you're more likely to notice when something isn't right. Sometimes the fix is simple. Sometimes it's a sign of a wiring fault.
Probably nothing to worry about:
- One light flickers, and replacing or tightening the bulb fixes it
- Lights dim very briefly when a big appliance, like a washing machine, starts up
Worth getting checked:
- Several lights flicker at once, or in more than one room
- Lights dim noticeably, or stay dim, when you switch something on
- A light switch feels warm, crackles or buzzes
- A new bulb flickers in the same fitting
These can point to a loose connection or an overloaded circuit, which need an electrician to trace. Our lighting repairs service covers everything from faulty fittings to wiring problems.
3. Warm, buzzing or scorched sockets and switches
Sockets and switches should never feel hot, make noise or change colour. If one does, it's one of the clearest signs of an electrical fault, and it's not one to wait on.
Stop using it and call an electrician if you notice:
- A socket or switch that feels warm or hot to the touch
- Buzzing, crackling or fizzing sounds
- Brown or black scorch marks
- A smell of hot plastic or burning
- Sparks when you plug something in
What to do:
- Switch off and unplug anything connected, if it's safe to do so.
- Don't use the socket or switch again until it's been checked.
- If you can smell burning and can't find the source, switch off at the fuse box if it's safe to reach, and call an electrician straight away.
Our emergency electricians can attend urgent faults like these.
4. Outdoor lights and sockets in wet weather
Outdoor lights, garden sockets and the cables that feed them take the brunt of winter rain. If water gets in, it can trip your fuse box or stop things working altogether.
Check outdoor fittings for cracked covers, loose seals or damaged cables, and keep socket covers closed when they're not in use. If your electrics trip every time it rains, our guide to telling a power cut from a tripped fuse box explains how to reset it safely, and our storm checklist covers what to look for after bad weather.
5. EV chargers in winter
If you have an electric car, you might wonder whether it's safe to charge in the rain. With a properly installed home charger, it is. Dedicated chargers are built to handle UK weather.
The risk comes from charging with a three-pin plug and an extension lead outside. Most household extension leads aren't designed for outdoor use or for the long, heavy load of charging a car, so they can overheat or let water in.
Signs your home charger needs checking:
- It won't start charging, or keeps stopping partway through
- It trips your fuse box when you plug in
- The casing is cracked, or water has got inside
- The cable or connector is damaged, or feels hot
Our electricians can find and fix faults with our EV charger repairs service, or fit a new charger with our EV charger installations if you're still using a three-pin plug.
6. Smoke alarms
With heaters, candles and more cooking at home, winter is a good time to make sure your smoke alarms are working. Fire services recommend testing them once a month by pressing the test button.
If an alarm doesn't sound, try a new battery first if it has a replaceable one. If it's mains-powered and still won't work, keeps chirping after a battery change, or goes off for no reason, it may need repairing or replacing. Our smoke detector repairs service can sort it.
When to call an electrician
Most of these warning signs are easy to spot once you know what to look for. Call an electrician if you notice:
- A socket, switch or plug that's warm, buzzing or scorched
- A burning smell you can't trace
- Lights that flicker across more than one room
- Electrics that keep tripping and won't reset
- An EV charger that won't charge or keeps cutting out
Never try to repair wiring, sockets or your fuse box yourself. If you're not sure what's causing a problem, our electrical fault finding service will trace it.
Need an electrician?
Our electricians can get your home's electrics back to normal, often the same day or the next. Book online in a couple of minutes or call us on 0333 733 1234.
