A flickering light may be a loose bulb, but it can also signal a failing connection, overloaded circuit or damaged wiring. If a socket feels hot, a fuse box keeps tripping, or you notice a burning smell, switch off power if safe and seek professional help.
Warning signs: emergency, urgent or book soon
Smoke, visible sparks, a burning smell, a hot consumer unit or damaged equipment near water mean you should isolate power if safe and call an emergency electrician today.
A consumer unit is the modern fuse box that controls each circuit and cuts power when it detects danger.
| Symptom | Likely risk | Safe action now | Help needed |
|---|
| Smoke, sparks, hot fuse box | Fire or electric shock | Keep clear; isolate power if safe | Emergency electrician, or 999 |
| Repeated RCD trips | Faulty appliance or wiring | Unplug appliances; do not keep resetting | Electrician within 24 hours |
| One trip after overload | Circuit overload | Unplug the appliance before one reset | Book if it happens again |
| One loose bulb flickers | Usually low, if no heat | Turn off and fit a known compatible bulb | Book if it continues |
Smoke, sparks or a burning smell
A persistent burning smell is never normal and can mean a loose connection is heating inside a fitting. Do not spray water, remove covers or touch melted equipment; call 999 if there is fire, smoke, arcing, injury or immediate danger.
An RCD, or residual current device, cuts power when electricity may be leaking somewhere unsafe. One trip after overloading a circuit may be manageable, but a breaker that trips repeatedly, will not reset or affects several rooms needs professional fault finding.
Flickering and heat can point to hidden faults
Flickering in one lamp can be a bulb issue, but lights that flicker in several rooms, dim together or suddenly become brighter may indicate wiring or supply problems.
Warm sockets and discoloured plates
A socket, switch or extension lead should not feel warm during normal use. Heat, brown marks, cracking plastic or buzzing can mean loose parts, excessive load or worn components; stop using the outlet and do not test it with another appliance.
Water makes electrical faults more urgent
Electricity near a leaking sink, wet bathroom floor, garden cable or damp utility room needs prompt professional assessment. Keep people away and avoid touching switches, appliances, taps or metal fittings if you suspect a fault.
A mild shock or tingling sensation from a tap, appliance, metal fitting or plug is one of the electrical warning signs that should never be ignored. It can indicate a loose electrical connection, damaged wiring or an appliance leaking current to earth. Likewise, a burning smell from a socket, scorch marks on a plug, exposed cable cores or electrical sparks when plugging in an appliance require immediate action: stop using the item, keep clear of the affected area and isolate power only if it is safe to do so.
Do not test the appliance in another outlet or handle damaged cables; arrange professional electrical fault finding instead.
Safe actions before the electrician arrives
Before an electrician arrives, unplug only safe-to-remove appliances, avoid the affected circuit and note the time, rooms affected, appliances in use, trips, smells and visible damage.
If the fault is not an emergency, use the Swansea electrician directory to compare suitably registered local electricians. Ask for a written scope that states testing, repair work, certificates and call-out charges before you agree to the visit.
Keep children, tenants, customers and pets away from the area, and take a photo from a safe distance of damaged cables, cracked plates or tripped switches. Do not remove faceplates or attempt to tighten wires.
A repair fixes a stated fault, while an Electrical Installation Condition Report (EICR) assesses the fixed installation as a whole. Private landlords in Wales must meet duties under the Electrical Safety Standards in the Private Rented Sector (Wales) Regulations 2020.
Choose a registered electrician, not just the lowest quote
A suitably qualified electrician should explain the fault clearly, give a written price or charging basis, and provide certification where needed, including for work covered by Part P and BS 7671 requirements.
Checks to make before booking
- Ask whether the electrician is registered with a scheme such as NICEIC or NAPIT where that registration suits the work.
- Confirm public liability insurance and relevant experience.
- Request a written scope covering fault finding, labour, parts, testing and VAT.
- Ask which certificate, guarantee or report you will receive.
- Read recent reviews for comments on explanations, punctuality and return visits.
Registration is not the whole check
Registration matters, but the electrician must also be competent for the specific job, particularly rewiring, EICRs, outdoor supplies or commercial work.
This guidance is less relevant when you are replacing a known compatible light bulb or resetting an RCD once after unplugging a clearly identified appliance. It does not replace emergency services: if there is fire, smoke, arcing, injury or immediate danger, call 999 and do not touch damaged equipment.
Your questions answered
What are the signs I need an electrician?
You need an electrician for repeated circuit trips, shocks, buzzing, hot fittings, sparks, burning smells or flickering in more than one room. Smoke, visible sparks or a hot consumer unit need urgent help today.
Is one tripped breaker an emergency?
No, not always. Reset it once only after unplugging the suspected appliance, but book an electrician if it trips again or will not reset.
Can I use a warm socket until it is fixed?
No. Stop using a socket, extension lead or plug that feels warm, smells burnt, buzzes or shows discolouration, then arrange an inspection.
Why do lights flicker when the washing machine runs?
It may be a loose connection, a circuit issue or a fault in the appliance. If lights dim in two or more rooms, arrange professional fault finding.
Do landlords need an EICR after every repair?
No, a small repair does not always require a new EICR. Landlords must still meet Welsh electrical safety duties and should ask whether the repair needs certification.
How quickly can an electrician diagnose a fault?
Simple appliance or socket faults may take 30 to 60 minutes to identify. Hidden wiring faults can take one to three hours because circuits need safe testing.
Act today when heat, smoke or repeat trips appear
Book a qualified Swansea electrician promptly when symptoms repeat, spread to other rooms or involve heat, shocks or water. Isolate power only when safe, keep clear of damaged equipment, and choose an electrician who will test, explain and document the work.
