Electrical Basics·Basic troubleshooting

How to find out why a power outlet is not working (2026)

Verified from sources Safety-critical topic

Quick Answer

A dead power outlet is often caused by a tripped circuit breaker, a tripped RCD/GFCI-protected outlet, a failed outlet, or a loose connection elsewhere on the same circuit. Start with the safest checks first: test the appliance, check nearby outlets, look for a tripped breaker or resettable protective outlet, and stop if anything looks burnt, loose or damaged. If simple resets do not restore power, or if the problem involves wiring, heat, sparking or repeated tripping, use a qualified electrician.

Safety first

Treat a dead outlet with signs of burning, melting, buzzing or heat as a potential fire risk and stop using it immediately.
Do not remove the outlet faceplate or touch internal wiring unless the circuit has been safely isolated and you are competent to verify it is dead.
Never keep resetting a breaker, RCD or protective outlet that trips repeatedly; this indicates a fault that needs investigation.
Keep hands dry and avoid troubleshooting in wet or damp conditions, especially for outlets in kitchens, bathrooms, outdoors or garages.
Use only test devices according to the manufacturer instructions.
If children can access the area, prevent use of the faulty outlet until it has been repaired.

When to call a professional: Stop and contact a qualified electrician if the outlet is burnt, warm, cracked, loose, buzzing, sparking or intermittent; if a breaker, RCD or protective outlet trips repeatedly; if multiple outlets are dead and simple resets do not help; if the fault is in a bathroom, kitchen, outdoor or other damp area; or if diagnosis would require opening the outlet or testing fixed wiring.

Overview

If one power outlet stops working, the fault may not be in that outlet alone. Many outlets are linked on the same circuit, and one tripped protective device or one loose connection can cut power downstream. The safest way to find the cause is to work from the simplest external checks towards anything more involved, without opening the outlet unless you are competent and local rules allow it. First rule out a faulty appliance by plugging in something you know works. Then check whether nearby outlets or lights are also dead, because that helps narrow the fault to one outlet, part of a circuit, or the whole circuit. Next, check the consumer unit or breaker panel for a tripped breaker or RCD, and look for any outlet with a test/reset function that may have tripped and cut power to others. If power is still absent, common causes include a worn or failed receptacle, a loose connection at the outlet or another outlet upstream, or a fault that causes protection to trip again. Signs such as heat, burning smell, crackling, scorch marks or repeated tripping mean you should stop and call an electrician rather than keep resetting and testing.

Who this is for

Homeowners and tenants doing basic, non-invasive troubleshooting of a household outlet that has stopped working.

What you’ll need

A lamp or small appliance you know works
Torch
Access to the consumer unit or breaker panel
If available, a simple plug-in outlet tester or voltage tester used according to its instructions
Your home electrical circuit labels, if available

Before you start

Unplug anything from the dead outlet. If the outlet is warm, smells burnt, makes noise, shows scorch marks, has visible damage, or the wall around it looks discoloured, do not touch it further or reset anything repeatedly. If the fault affects a bathroom, kitchen, outdoor area or any damp location, be extra cautious and use a qualified electrician if the cause is not immediately obvious.

Step-by-step

1
Confirm the problem is the outlet, not the appliance
Plug a device you know works, such as a lamp, into the outlet. Then test the original appliance in a different outlet that you know has power.
Why: This avoids chasing an electrical fault when the real issue is a failed appliance, plug fuse or charger.
2
Check whether other outlets or lights are affected
Test nearby outlets and note whether any lights, fixed appliances or other sockets in the same room or area have also lost power.
Why: If only one outlet is dead, the fault may be a failed receptacle or local connection. If several points are dead, a protective device or upstream wiring fault is more likely.
3
Look for a tripped breaker or RCD at the consumer unit
Go to the consumer unit or breaker panel and look for any breaker or residual-current device that is in a tripped position. Follow the panel labelling if present. If a device has tripped, switch it fully off first if required by the manufacturer instructions, then back on once.
Why: Circuit breakers and RCDs are designed to cut power when they detect overloads, short circuits or earth leakage. Restoring a tripped device can bring the outlet back if the trip was temporary.
4
Check for a tripped resettable protective outlet
Look in bathrooms, kitchens, utility spaces, garages, outdoors and nearby rooms for an outlet with test/reset buttons or other resettable protection. If you find one that has tripped, press reset once in line with the device instructions.
Why: One protective outlet can feed and protect other outlets downstream, so the dead outlet may be controlled from somewhere else.
5
If protection trips again, stop and isolate the likely load
If a breaker, RCD or protective outlet trips again immediately or shortly after reset, unplug devices on that circuit and try once more. If it still trips with loads removed, stop troubleshooting and arrange professional inspection.
Why: Repeated tripping usually indicates an actual fault, not a nuisance event. Continuing to reset can be unsafe and may worsen damage.
6
Inspect for visible signs of outlet failure without opening it
With power left on only if you are doing external checks, look for a loose faceplate, cracked outlet, discolouration, humming, buzzing, intermittent power, or plugs that no longer grip firmly. Do not remove covers or touch internal parts while energised.
Why: These signs point to a worn or damaged outlet or a poor connection, both of which can overheat and become dangerous.
7
Use a qualified electrician for internal outlet or wiring faults
If the outlet remains dead after resets and external checks, or if only part of a circuit is dead, book a qualified electrician to test the outlet, connections and upstream devices. They may need to isolate the circuit, test for voltage and continuity, and inspect other outlets on the same run.
Why: Loose terminations, failed receptacles and open connections are common causes, but they require safe isolation, proper test equipment and competence to diagnose correctly.

Why this works

Electrical troubleshooting works best by narrowing the fault location. Testing the appliance rules out the load, checking nearby outlets shows whether the fault is local or circuit-wide, and checking breakers, RCDs and protective outlets identifies whether a safety device has interrupted power. If those simple causes are excluded, the remaining likely faults are damaged outlets or failed connections that need proper electrical testing.

Common mistakes to avoid

Assuming the outlet is faulty without first testing the appliance
Resetting a tripped breaker or protective outlet repeatedly when it will not stay on
Ignoring scorch marks, buzzing, heat or burning smells
Opening an outlet or touching wiring without safely isolating the circuit and proving it is dead
Forgetting that a resettable outlet in another room may control the dead outlet

Troubleshooting

Only one outlet is dead, but nearby outlets still work

The outlet itself may have failed or a local connection may be loose. Stop if there are any signs of heat or damage, and have an electrician inspect and replace or re-terminate it as needed.

Several outlets in one area are dead

Check the consumer unit for a tripped breaker or RCD and check for a tripped resettable protective outlet nearby. If resets do not restore power, an upstream connection fault may exist and needs professional testing.

Breaker or RCD trips again as soon as it is reset

Unplug devices on that circuit and try once more. If it still trips, stop and call an electrician because there may be a wiring fault, damaged outlet or faulty appliance.

Outlet works intermittently

Treat this as a warning sign of a poor connection or worn receptacle. Avoid using it and arrange repair rather than waiting for complete failure.

Outlet looks burnt, cracked or loose

Do not use it. Isolate the circuit if you can safely identify it and call a qualified electrician for replacement and inspection of the wiring.

Compare your options

Basic external checks only

Best for: Tenants, non-experts, and early troubleshooting

Pros: Low risk, quick, often finds simple causes like a tripped breaker or faulty appliance

Cons: Will not identify internal wiring faults or failed terminations

Using a plug-in outlet tester

Best for: Basic diagnosis where the outlet still has some power or appears miswired

Pros: Fast indication of some common outlet conditions when used correctly

Cons: Cannot diagnose every fault and does not replace proper electrical testing

Qualified electrician diagnosis

Best for: Repeated tripping, dead circuits, damaged outlets, or any internal fault

Pros: Can safely isolate, test and repair the actual fault

Cons: Costs more than simple DIY checks and may require scheduling a visit

Option	Best for	Pros	Cons
Basic external checks only	Tenants, non-experts, and early troubleshooting	Low risk, quick, often finds simple causes like a tripped breaker or faulty appliance	Will not identify internal wiring faults or failed terminations
Using a plug-in outlet tester	Basic diagnosis where the outlet still has some power or appears miswired	Fast indication of some common outlet conditions when used correctly	Cannot diagnose every fault and does not replace proper electrical testing
Qualified electrician diagnosis	Repeated tripping, dead circuits, damaged outlets, or any internal fault	Can safely isolate, test and repair the actual fault	Costs more than simple DIY checks and may require scheduling a visit

Alternatives

Ask your landlord, building manager or maintenance team to investigate if you do not own the property
Use another known-safe outlet temporarily for low-load devices while waiting for repair, but do not use extension leads as a long-term substitute

Pro tips

Label which outlets and lights lose power when a breaker is off; it makes future diagnosis much easier
If a protective outlet keeps tripping only when one appliance is plugged in, that appliance may be faulty
Take a photo of the consumer unit before and after a trip so you can compare switch positions
If panel labels are unclear, have an electrician identify and label circuits during the repair

Legal & regulatory notes

Electrical work rules vary by country and sometimes by region. In many places, replacing outlets or working on fixed wiring may require a competent person and may be restricted in bathrooms, outdoors or other higher-risk locations. Follow local regulations, tenancy agreements and building management rules, and use a licensed or otherwise qualified electrician where required.

What this guide does not cover: This guide covers safe, basic troubleshooting only. It does not provide full wiring diagnostics, permit or code advice for your area, step-by-step fixed-wiring repair instructions, or guidance for commercial, industrial, three-phase or specialist electrical systems.

Cost considerations

Simple causes such as a tripped breaker or protective outlet cost nothing to reset. Costs rise if the outlet needs replacement, if there is a loose connection elsewhere on the circuit, or if fault-finding is needed across multiple outlets or the consumer unit. Repeated tripping or heat damage can mean more extensive repair than a simple outlet swap.

Prefer to hire a professional?

If this job is beyond a confident DIY — or the work needs to be done by a licensed professional — you can find a verified electrician through Trade Directory (tradedirectory.co.nz), New Zealand's directory of real, verified trade businesses. Compare local tradespeople, read their details and request quotes before you commit.

Find a electrician on Trade Directory

Frequently asked questions

Can one dead outlet mean there is a problem somewhere else?+

Yes. Outlets are often wired in groups, so a tripped protective device or a loose connection at an upstream outlet can cut power to another outlet further along the circuit.

Why does the breaker stay on but the outlet is still dead?+

The outlet may be fed through a resettable protective outlet elsewhere, the receptacle itself may have failed, or there may be a loose or broken connection on that branch of the circuit.

Is it safe to use an extension lead from another outlet instead?+

It may be acceptable as a short-term workaround for a low-load device if the extension lead is suitable and in good condition, but it is not a fix. Do not overload the extension lead or route it where it can be damaged or create a trip hazard.

Should I replace the outlet myself?+

Only if local rules allow it and you are competent to isolate the circuit, prove it is dead, and reconnect it correctly. If you are unsure, or if there are signs of damage or repeated tripping, use a qualified electrician.

What if the outlet works again after I reset the breaker?+

Monitor it. If it trips again, or if the outlet becomes warm, noisy or intermittent, stop using it and have it checked. A one-off trip can happen, but repeated trips mean there is likely an underlying fault.

Sources & references

Guidance on this page is traced to documented sources. Last checked 24 September 2026.

Electrical Safety First · industry
Supports general home electrical safety guidance, the importance of stopping when there are signs of damage or overheating, and using a registered electrician for electrical faults.
NFPA - Electrical Safety in the Home · industry
Supports advice on recognising warning signs such as sparks, overheating and damaged receptacles, and the fire risk posed by faulty outlets and wiring.
Consumer Product Safety Commission · government
Supports general consumer electrical safety advice, including caution around damaged outlets and the need to address shock and fire hazards.

Basic troubleshooting principles stay fairly stable, but local electrical rules and accepted DIY scope vary by location and can change.