Boiler Repair London
Local & Emergency Boiler Engineers
Our London boiler engineers deliver fast, professional, gas‑safe boiler repairs across London 24/7 where required, for homeowners, landlords and letting agents.
- 10% Off for New Customers
- Gas Safe Certified
- 1 Hour Call Out Time
- 24/7 Across London
- Holidays & Weekends
Boiler Repair Near Me
When someone searches “boiler repair near me” they want an engineer who actually knows boilers not a general plumber. Our local boiler repair service is specialised: we focus on boilers only so our engineers see and fix the same faults every day. That technical repetition lets us resolve problems faster and with fewer return visits.
We operate as a local boiler repair network across London. That means shorter travel times, quicker call‑outs for urgent repairs and engineers who understand London properties flats, period homes & new builds.
What makes our local service different: rapid attendance, diagnostic-first repairs, component-level replacements (not unnecessary boiler swaps), and Gas Safe certified workmanship.
Emergency Boiler Repair
We run a genuine 24 hour boiler repair London service for urgent breakdowns. If your boiler stops in the evening, during a weekend, or in cold weather, you can call our emergency engineers for rapid response.
These issues are treated as emergencies and we prioritise them for rapid attendance:
- Complete boiler breakdowns, immediate diagnostic and safe restoration where possible.
- Boilers shutting down due to safety faults, diagnosis and isolation to prevent danger.
- Gas-related emergency issues, immediate gas isolation and Gas Safe certified repairs.
- Boilers leaking onto electrical components, urgent isolation and repair to prevent permanent damage.
- Heating failure during cold weather, priority response for vulnerable households.
Boiler Engineer Near Me
Gas-related faults must be handled by Gas Safe engineers. Our gas boiler repair near me engineers are Gas Safe registered and perform full safety checks after every repair, including combustion checks where required.
Common gas-related repairs we handle: gas supply and ignition issues, ignition and pilot light failures, gas valve replacement, and emergency gas isolation and testing for faults that present a safety risk. We never cut corners on gas work safety is non‑negotiable.
When someone searches “boiler repair near me” they want an engineer who actually knows boilers not a general plumber. Our local boiler repair service is specialised: we focus on boilers only so our engineers see and fix the same faults every day. That technical repetition lets us resolve problems faster and with fewer return visits.
We operate as a local boiler repair network across London. That means shorter travel times, quicker call‑outs for urgent repairs and engineers who understand London properties flats, period homes & new builds.
What makes our local service different: rapid attendance, diagnostic-first repairs, component-level replacements (not unnecessary boiler swaps), and Gas Safe certified workmanship.
Gas Boiler Repair Near Me
Gas boiler not working? Don’t wait call our Gas Safe engineers for fast, reliable gas boiler repair near me. Same-day callouts across London, genuine parts, and guaranteed safety. Get your heating and hot water back today!
Boiler Repairs Near Me
If you’re experiencing boiler issues, don’t wait call us for emergency boiler repairs London or a local engineer near you. Below are the common faults we repair every day. Each includes what to look for, why it happens, and how our Gas Safe engineers fix it quickly and safely.
Symptoms: Radiators are cold and taps produce no hot water.
Cause: Failed circulation pump, diverter valve, PCB fault, thermostat failure, or lack of gas supply.
Fix: Our engineers carry out a full diagnostic on-site, replace any failed components, recommission the system, and test all zones. Call now if your boiler isn’t heating your home same-day repairs often available in London.
Symptoms: Boiler tries to ignite then shuts down, or cuts out under load.
Cause: Faulty ignition electrodes, flame sensor, fan issues, low pressure, or safety lockouts.
Fix: We replace ignition components, test the gas valve and fan, and clear any faults using the manufacturer’s reset procedures. Need an emergency boiler repair near you? Contact our local London engineers now.
Symptoms: Boiler shows low pressure and may trip on low-pressure lockout.
Cause: Leaks, failed expansion vessel, or a faulty filling loop.
Fix: We locate and repair leaks, recharge or replace the expansion vessel, and fully re-pressurise and test the system. For fast local boiler repair in London, call us today.
Symptoms: No flame or boiler refuses to light.
Cause: Electrode failure, flame sensor issue, or gas supply problem.
Fix: We replace electrodes and sensors, check gas pressure, and test combustion and safety systems. If your boiler won’t light, contact our London boiler repair experts immediately.
Symptoms: Manufacturer fault codes displayed on the boiler panel.
Cause: Electrical, hydraulic, or combustion faults.
Fix: We decode the fault, carry out targeted component testing, repair or replace parts, and perform a full re-test. Boiler showing an error code? Call for local boiler repair near you today.
Symptoms: Water beneath the boiler or visible corrosion.
Cause: Failed seals, cracked heat exchanger, or valve failure.
Fix: We isolate and drain the system, replace seals, valves, or heat exchangers as needed, and inspect surrounding electrics. Boiler leaking in London? Get an emergency repair now.
Our Services
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10+ Years of experience
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Boiler Repair London
Boiler Brands We Repair
We provide specialist boiler repairs across London for the most common boiler brands. Whether you need a boiler repair near me, emergency boiler repair London, or a trusted local engineer, our Gas Safe technicians have the expertise to fix faults quickly and safely. Below are our manufacturer specific repair services with typical faults and how we resolve them.
Worcester Bosch Boiler Repair
Worcester Bosch boilers are one of the most common choices in London homes. Our Worcester Bosch boiler repair London service covers combi, system and regular models. Typical faults include pressure fluctuations from expansion vessel problems, diverter valve or pump issues on combi boilers, and PCB or sensor failures. We follow Worcester-approved diagnostics to read fault codes, test combustion, and verify flow and return temperatures. Replacement parts are either genuine or high-quality equivalents, and every repair includes a full recommission and Gas Safe safety check. If your Worcester Bosch boiler has stopped working, call us for emergency boiler repairs in London our local engineers can often attend the same day.
Vaillant Boiler Repair
Vaillant boilers are popular in mid-range installations and can present faults such as ignition failure, water pressure issues, or PCB-related lockouts. Our Vaillant boiler repair near me engineers are experienced with the full range of models, handling both gas control and hydraulic issues. We test ignition circuits, fan operation, and gas valve response using manufacturer diagnostics. PCB failures after voltage spikes or water ingress are repaired with genuine parts, followed by manufacturer specified recommissioning. Pressure loss faults are also checked and resolved. If you need a Vaillant boiler repair London, call our emergency boiler repair team now same-day callouts are available in most areas.
Ideal Boiler Repair
Ideal boilers are widely used in older and modern properties. Common faults include pump failure, airlocks causing poor circulation, heat exchanger blockages, and ignition problems. Our Ideal boiler repair near me service diagnoses whether the fault is hydraulic, electrical, or combustion-related. Pumps are replaced with OEM or approved equivalents, blockages flushed and ignition faults repaired by testing electrodes, flame sensors and gas valves. Fault codes are interpreted and resolved according to manufacturer procedures. If your Ideal boiler has stopped working, contact our London engineers for emergency boiler repair we can often fix it on the first visit.
Baxi Boiler Repair
Baxi boilers, common across London, often suffer from diverter valve failures, pressure loss, or ignition lockouts. Our Baxi boiler repair London service replaces diverter valves and motorized valve components, checks system hydraulics, and diagnoses pressure issues via expansion vessels, PRVs, or leaks. Ignition and PCB problems are repaired using Baxi diagnostics and genuine components where possible. Experiencing a Baxi boiler fault? Call for local boiler repair near me or emergency boiler repairs London our engineers respond quickly and safely.
Vaillant Boiler Repairs
Efficient Vaillant boiler repairs by Gas Safe engineers. Same-day callouts, genuine parts, and guaranteed service restoring warmth and comfort fast.
Ideal Boiler Repairs
Expert Ideal boiler repairs using genuine parts. Fast diagnostics, affordable pricing and trusted engineers keeping your home warm and safe.
Corgi Boiler Repairs
Trusted Corgi boiler repairs by qualified engineers. Quick response, safe service and long-lasting results using approved parts and expertise.
Baxi Boiler Repairs
Professional Baxi boiler repairs with same-day service. Certified engineers ensure reliable heating, safety, and performance using genuine Baxi parts.
Worcester Boiler Repairs
Fast, reliable Worcester boiler repairs by Gas Safe engineers. Genuine parts, same-day service, and guaranteed results to restore heating efficiently.
Combi Boiler Repairs
Fast, reliable Combi boiler repairs by Gas Safe engineers. Genuine parts, same-day service and guaranteed results to restore heating efficiently.
Local Boiler Repair Near Me
24/7 Boiler & Heating Engineer
Local Emergency Plumber
Even if you don’t find your area above, we are expanding everywhere in Greater London, so call us we can help!
Emergency Boiler Repair London
Looking for gas boiler repair near me? Our fully qualified Gas Safe engineers are your trusted local experts for London boiler repairs. We fix all makes and models, offering safe, professional, and affordable repairs.
Call today to book your repair and enjoy peace of mind with a reliable boiler repair London service.
FAQ:
How do I know if my boiler needs repairing?
There are a few clear signs that your boiler might need repairing. The most obvious one is when you have no heating or hot water, or the temperature keeps dropping for no reason. Another common issue is when the boiler keeps switching itself off or showing an error code on the display. Unusual noises like banging, gurgling or whistling can also mean there’s air trapped in the system, low water pressure, or a failing pump.
You might also notice the radiators aren’t heating evenly, or the boiler pressure keeps dropping below one bar. Leaks or puddles around the unit are another strong sign something’s wrong usually from a faulty seal, valve, or internal corrosion.
In short, if your boiler starts acting differently making noises, losing pressure, or giving inconsistent heating it’s time for a repair check. Catching issues early prevents bigger, more expensive damage later and keeps your system running efficiently and safely.
Do you offer emergency boiler repairs?
What types of boilers do you repair?
We repair all main types of boilers used in UK homes as: combi boilers, system boilers, and regular (conventional) boilers. Our engineers are trained and experienced with leading brands like Worcester Bosch, Vaillant, Ideal, Baxi and more.
Combi boilers are very common in London flats and smaller houses. They heat water directly from the mains, so when they fail, you usually lose both hot water and heating at once. We deal with issues like ignition failures, low pressure and faulty diverter valves on these units all the time.
System boilers and regular boilers are often found in larger properties with cylinders and water tanks. Repairs on these systems can involve pumps, valves, or expansion vessels. We also handle problems like leaking pipework or airlocks that stop hot water circulation.
Whether your boiler is modern or older, our engineers carry diagnostic tools to identify faults quickly and safely. We only use manufacturer-approved replacement parts to ensure reliability. In most cases, repairs can be completed the same day, provided no special parts are required.
Is it safe to repair a gas boiler?
Gas boilers should only ever be repaired by Gas Safe registered engineers. It is not safe to attempt repairs yourself or to use someone who isn’t qualified. Gas systems can be dangerous if handled incorrectly, leading to gas leaks, carbon monoxide poisoning or even explosions.
A Gas Safe engineer is trained to work safely with gas appliances and understands how to isolate faults without risking your home’s safety. We check for leaks, test combustion levels and ensure the flue is venting properly before and after any repair.
During a professional repair, the engineer will inspect all safety controls, seals and connections to confirm the boiler is operating correctly. Once the work is complete, they’ll test the system and ensure it meets safety regulations.
If your boiler ever smells of gas, shows a yellow flame, or causes headaches or dizziness in the house, turn it off immediately, open windows and contact a Gas Safe engineer.
Keeping safety first means using only qualified professionals. It protects your home, ensures compliance with legal standards, and keeps your boiler warranty valid.
Book Your Boiler Repair in London Today
Don’t let a faulty boiler leave you in the cold. At Onsite Contractors and Plumbing Ltd, we specialise in fast, reliable, and affordable boiler repair London services. Whether it’s a small issue or a major breakdown, our experts can help.
Call us now and book your same-day repair with trusted London boiler repairs specialists.
Onsite Contractors and Plumbing Ltd. has been serving London for over 10 years.
We are a locally owned and operated business dedicated to customer satisfaction.
Over 70% of our work comes through referrals, reflecting the trust our customers place in us.
Whether you need plumbing, heating, or gas services, our experienced team is here to help.
Onsite Contractors and Plumbing Ltd. Registered office address: Apex House, 2nd Floor, Grand Arcade, London, England, N12 0EH, Company number : 09510946