Electrical Fault Finding in Hereford (2026 Guide)

Short answer: Electrical fault finding in Hereford means tracing why a circuit trips, a light flickers, a socket stops working or something smells hot, then repairing the cause rather than just resetting the switch. Most faults come from an overloaded circuit, a faulty appliance, damaged wiring, moisture or a worn protective device. If a breaker trips again straight after you reset it, or you notice burning smells, scorch marks, sparks or a shock, stop using the circuit and call a qualified electrician.

Most of us only think about our electrics when something stops working. A breaker trips in the middle of cooking, the lights flicker when the heating comes on, or a socket goes dead. It is easy to flip the switch and carry on, but a circuit that trips is doing its job: it is telling you something is wrong.

This guide is written by RJH Electrical Services, a Hereford electrician with more than two decades of experience in domestic and commercial work, including fault finding and rectification. It explains the most common electrical faults, what you can safely check yourself, what you should never do, how an electrician tracks a fault down, and how to get help quickly if the problem is urgent.

Key facts at a glance

• Who: RJH Electrical Services (Richard Haines), a Hereford electrical contractor with more than two decades of experience
• Fault finding and rectification: homes, shops, offices, warehouses and agricultural buildings
• Emergency breakdowns: we offer emergency electrical breakdown cover for urgent, unforeseen faults and aim to rectify them quickly
• Where: Hereford and Herefordshire, and surrounding areas when the work requires it
• Hours: 8am to 6pm
• Contact: 07792 195612 or the contact form

What is electrical fault finding?

Short answer: It is the process of locating and repairing the cause of an electrical problem using inspection and testing, rather than guessing.

A fault is anything that stops the installation working as it should or makes it unsafe. Fault finding combines a visual inspection with measurements taken using specialist test equipment, such as insulation resistance and continuity testing. The aim is to find the exact circuit, accessory or appliance responsible, repair it properly and confirm that the circuit is safe afterwards.

That is different from simply replacing parts until the problem goes away. Guesswork can hide a dangerous fault, cost more in the long run and leave the real cause in place. Our domestic and commercial electrical work includes systematic fault finding so that the repair lasts. You can see the range of work we cover on our Domestic page.

Why does my breaker keep tripping?

Short answer: The usual causes are an overloaded circuit, a faulty appliance, an earth leakage fault from damaged wiring or moisture, or a protective device that is worn out.

A consumer unit has two main kinds of protection. Circuit breakers (MCBs) switch off when a circuit is overloaded or short-circuits. RCDs (residual current devices) switch off when electricity leaks to earth, which could pass through a person. Which one trips tells you something about the problem.

Overload. Too much equipment is running on one circuit, for example a kettle, toaster and microwave on the same ring. The breaker trips because the cable could overheat. If it only happens when several things are on, overload is likely.

Short circuit. A live and neutral conductor touch, usually from damaged cable, a loose connection or a failed appliance. The breaker trips instantly and sometimes with a bang or a flash.

Earth leakage. Current is escaping to earth through damaged insulation, a faulty heating element, a damp accessory or an appliance fault. The RCD trips, often repeatedly, and sometimes only when it is raining or humid.

A faulty appliance. Washing machines, tumble dryers, dishwashers, immersion heaters and electric showers are common culprits, particularly as heating elements age.

A worn or faulty protective device. Older consumer units and RCDs can become oversensitive or fail. If your unit is old, see our guide to consumer unit upgrades on the Domestic page.

Moisture. Outdoor sockets, garage and shed supplies, and kitchens or bathrooms can trip circuits when water gets into an accessory or cable.

What can I safely check myself?

Short answer: You can unplug appliances, reset the breaker once and see whether it holds. If it trips again immediately, stop and call an electrician.

These simple steps are safe for most households.

1. Switch off and unplug. Unplug everything on the affected circuit, or switch off the appliances that are on it.
2. Reset the breaker once. Push the switch fully off and then on again. If it holds, the problem was probably an overload or a single appliance.
3. Plug items back in one at a time. If the breaker trips when a particular appliance is plugged in or switched on, that appliance is the likely cause. Leave it unplugged and have it repaired or replaced.
4. Note what you see. Is it one circuit or several? Does it happen at a certain time, in wet weather, or when a certain appliance runs? This information helps an electrician find the fault faster.
5. Check for obvious damage. Look for cracked sockets, scorch marks, damaged cable on appliances or signs of water, but do not open anything up.

What should I never do?

Short answer: Never keep resetting a breaker that trips straight away, never take covers off the consumer unit, and never work on wiring yourself.

• Do not hold a breaker on or bypass it. A trip is a safety response. Forcing it can cause overheating or a fire.
• Do not open the consumer unit. The supply to it stays live even when the main switch is off.
• Do not use a socket that is scorched, hot, cracked or smelling of burning.
• Do not use electrical equipment near water if you suspect a fault.
• Do not replace a breaker with a larger one. The cable behind it is sized for the original rating, and a larger breaker removes the protection.
• Do not ignore repeated tripping. Intermittent faults are often the early warning of something worse.

Electrical Safety First, the UK electrical safety charity, publishes independent safety advice for householders at electricalsafetyfirst.org.uk.

What counts as an electrical emergency?

Short answer: Burning smells, smoke, sparks, scorching, an electric shock, exposed live wires, water near electrics or a power loss to the whole property that is not a supply cut are emergencies.

If any of these happen, stay safe first.

• If there is a fire, or smoke you cannot control, get everyone out and call 999. Do not try to put out an electrical fire with water.
• If there is a burning smell or sparking and it is safe to reach, switch off at the main switch and keep people away from the area.
• If someone has had a shock, do not touch them until the power is off. Call 999 if they are hurt.
• If there is flooding or water entering electrics, do not touch anything electrical and switch off the supply only if you can do so without standing in water.
• Call a qualified electrician once the immediate danger is handled.

We offer emergency electrical breakdown cover for urgent and unforeseen faults and aim to rectify them quickly. Call us on 07792 195612.

How does an electrician find a fault?

Short answer: By talking to you about the symptoms, inspecting the installation, then isolating circuits and testing them until the faulty part is found.

1. Listening. We ask what happens, when and how often. A good description saves time.

2. Visual inspection. We look at the consumer unit, visible wiring, accessories and appliances for damage, heat marks and poor connections.

3. Isolating circuits. We switch circuits off and on in turn and disconnect equipment to narrow down where the fault is.

4. Testing. Using specialist test instruments, we measure insulation resistance, continuity, earth fault loop impedance and RCD operation. Insulation resistance testing is particularly useful for tracing earth leakage.

5. Locating the fault. We trace it to a specific cable, accessory, joint or appliance.

6. Repairing it properly. We repair or replace the faulty part, not just the symptom, and make sure the repair meets current standards.

7. Re-testing and explaining. We retest to confirm the circuit is safe, and explain what we found and whether anything else needs attention.

What are the most common electrical faults in homes?

Short answer: Tripping breakers, flickering lights, dead sockets, warm or scorched accessories, buzzing noises and appliances that trip the supply.

Flickering or dimming lights. This can be a failing bulb or fitting, but it can also point to loose connections, which can overheat. If it affects several lights, or happens when large appliances start, get it checked.

Dead sockets or lighting circuits. A tripped device, a loose connection, a broken conductor or a failed accessory can cut off part of a circuit.

Warm, discoloured or scorched sockets and plugs. Heat usually means a loose connection or overloaded circuit. Stop using the socket.

Buzzing, humming or crackling. Sounds from sockets, switches or the consumer unit can indicate loose or arcing connections.

Appliances that trip the RCD. If one appliance trips the supply every time, the appliance is almost certainly faulty.

Outdoor and garage supplies tripping. Moisture ingress is common, particularly where cable or accessories are old.

Burning smell with no visible cause. Switch off the circuit if you can, and call an electrician promptly.

Are older Herefordshire properties more prone to faults?

Short answer: Often, yes. Older homes, farmhouses and outbuildings tend to have older wiring, more alterations and more damp, all of which make faults more likely.

Herefordshire has many Victorian and Edwardian terraces, post-war homes, period cottages, farmhouses and barn conversions. Many have been extended or altered over the years, sometimes by different people, so it is common to find modern circuits added to older wiring, or cables that have been damaged by building work or by age. Outbuildings, garages and workshops are often supplied by long cable runs that are exposed to damp.

None of this means your property is unsafe. It does mean that persistent tripping, flickering or warm accessories in an older property deserve a proper inspection. If you have not had your wiring tested for many years, an EICR will show the overall condition of the installation. We cover this on our Domestic page.

What about faults in shops, offices and farms?

Short answer: In business premises a fault stops trading, so speed and a lasting repair both matter.

A tripped supply in a shop, office, warehouse or farm can stop tills, refrigeration, machinery or milking equipment. We carry out fault finding and rectification in commercial and agricultural buildings and aim to restore supplies as quickly as possible, then make sure the underlying cause is fixed. Where faults are recurring, a periodic inspection and planned maintenance can prevent repeat call-outs. See our Commercial page for the premises we work in.

Can faults be prevented?

Short answer: Largely, with regular testing, sensible use of circuits and prompt attention to warning signs.

• Have the installation tested periodically. An EICR finds defects before they become faults.
• Avoid overloading. Do not run many high-power appliances on one socket or extension lead.
• Replace old consumer units. Modern units with RCD protection respond faster and more reliably.
• Replace damaged leads and accessories. Do not leave cracked plugs or frayed cable in use.
• Keep moisture out. Use properly rated outdoor accessories and enclosures.
• Act on warning signs. Flickering, warm sockets and repeated tripping are not normal.

How do I choose an electrician for fault finding?

Short answer: Choose someone who is qualified, insured, explains what they find and repairs the cause, not just the symptom.

Ask these questions.

• Are you qualified and registered with a competent person scheme, and which one?
• Do you have the right test equipment and will you test the circuit after repair?
• Will you explain what the fault was and what you did?
• Do you provide certificates or a written record where required?
• Do you offer emergency cover for urgent faults?

RJH Electrical Services is fully certified and insured, and our qualifications are listed on our Qualifications page. You can see examples of our work in the Gallery.

Where do we cover?

Short answer: We cover Hereford and surrounding Herefordshire, and will travel further when the work requires it.

• Hereford city and suburbs, including Tupsley, Holmer, Belmont, Hampton Park and Credenhill
• Leominster and the north of the county
• Ledbury and the east of the county
• Ross-on-Wye and the south of the county
• Kington and the west of the county, towards the Welsh border
• Bromyard
• Hay-on-Wye, Weobley, Madley, Peterchurch, Pontrilas and Fownhope and surrounding villages

What mistakes should I avoid?

• Ignoring repeated tripping. It is a warning, not a nuisance.
• Resetting again and again. If the breaker trips immediately, stop.
• Using temporary fixes. Tape, larger breakers and extension leads hide problems rather than fixing them.
• Calling an unqualified person. Unregistered or uninsured work can create new faults and cause problems with insurance.
• Not telling the electrician the history. When, where and how often it happens speeds up diagnosis.
• Leaving it until it fails completely. Faults tend to get worse, and fixing an early fault is usually simpler.

Frequently asked questions

Why does my electric keep tripping? Common causes are an overloaded circuit, a faulty appliance, damaged wiring or moisture. Unplug appliances and reset once. If it trips again straight away, call an electrician.

Is a tripping RCD dangerous? The trip itself is the protection working, but the cause may be a real fault. Do not keep resetting it, and get it investigated.

Why do my lights flicker? A failing bulb or fitting is the simplest cause, but loose connections or an overloaded circuit are also possible. If several lights flicker, get it checked.

Can I fix a dead socket myself? You can check whether the breaker has tripped and whether another appliance works in it. Do not open sockets or work on wiring unless you are qualified.

How long does fault finding take? Simple faults can be found quickly, while intermittent or hidden faults take longer because they need systematic testing. We will explain what to expect after an initial inspection.

Do you provide emergency electrical services? Yes. We offer emergency electrical breakdown cover for urgent and unforeseen faults and aim to rectify them quickly. Call 07792 195612.

Do you work outside Hereford city? Yes. We work across Herefordshire, including Leominster, Ledbury, Ross-on-Wye, Kington and Bromyard.

Can you fix faults in shops, offices and farms? Yes. We carry out fault finding and rectification in commercial and agricultural premises as well as homes.

About RJH Electrical Services

RJH Electrical Services is a Hereford-based electrical contractor run by Richard Haines, who has more than twenty years of experience. The business serves homeowners, small businesses and other trades across Herefordshire, covering domestic installations, rewires, testing and inspections, maintenance and fault rectification, commercial installations and renewable energy work including EV chargers, solar and battery storage. RJH is also available to other firms as a subcontractor. The aim on every job is work that is clean, fast and reliable, with good communication from first call to handover.

Related pages

Explore more from RJH Electrical Services:

• Domestic electrical services
• Commercial electrical services
• Renewable energy: EV chargers, solar and battery storage
• Our services
• Our qualifications
• Gallery of our work
• About RJH Electrical Services

Get help with an electrical fault in Hereford

If you have a tripping circuit, a dead socket or any electrical problem you are unsure about, RJH Electrical Services can find the cause and fix it properly. Call or message 07792 195612, or use the contact form, and tell us what is happening.

Last updated: October 2026. If you suspect a dangerous fault, switch off if it is safe to do so and call a qualified electrician or the emergency services.

Sources: Electrical Safety First · NICEIC · Approved Document P (GOV.UK)