Boiler Replacement London

Guaranteed heating and gas engineers for 24/7 central heating and gas repairs in London. Our local Gas Safe heating engineers are one call away from delivering urgent heating and gas services in London.

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Boiler Engineer London


London Boiler Installation

Select the gas and heating service you need.


2. Choose a Date & Time

Confirm online or request a call back to arrange your booking.


3. Book your Heating Engineer

Sit back, stay warm. We’ll be with you in no time.

Boiler Replacement London

What makes our service amazing.

Gas Safe Registered

Gas Safe Registered, safe contractor approved and experienced engineers

12 Month Guarantee

12 month Fixcrowd gas service guarantee

10 Year Baxi Guarantee

Up to 10 years of cover for Baxi boilers installed by Fixcrowd

12 Year Worcester Guarantee

Up to 12 year guarantee for Worcester Bosch boilers installed by Fixcrowd

10 Year Vaillant Guarantee

Up to 10 years of cover for Vaillant boilers installed by Fixcrowd

Fixed Price

Fixed pricing structure guaranteed for heating and gas quotes

Local, trusted and experienced.

See what our customers say about us.

Abby Keningale
A fantastic company that go above and beyond for their customers. They are responsive to queries, deliver excellent standards of work for reasonable prices, and always take the time to answer any queries. Would highly recommend!!
Agata Ryszewska
Excellent work. Thank you 👍
Samanta Lehto
Excelent customer service and efficient work. Areef managed to get a plumber to visit my residence in about 30 minutes for an emergency work, and kept me updated all the way through in regard to the service being done. The plumber attending my address was also very friendly and professional. I would highly recommend Fixcrowd services.
Jennifer Sampson
Barry from Fixcrowd did a great job to repair the leaking radiator and doorbell. He was so helpful and efficient. He also fixed a light switch that he noticed was broken. The team at Fixcrowd are professional and reliable.
Hassan Ahed
The team at Fixcrowd have exceeded my expectations! The team is punctual, professional and super efficient. Could not recommend them enough. A fine example of delivering a hassle free service without emptying your pockets.
C4H4AsH Mac
Jeffrey was awesome, answered my query efficiently and sorted a call back. Thanks put my mind at rest and was brilliant !
Zain Umer
Needed some urgent repair work to boiler. Fast, easy to arrange and decent price. Staff very professional is job. Would recommend and use again
Kinan K
Fix crowd are very professional, extremely helpful and handle all our properties with care which makes the experience of working with them very rewarding! I would not hesitate to recommend them to anyone looking to have a service with very high standard!
Katey Tetteh
The service was great and Harvey was extremely helpful in guiding me through the letting process. He was always very timely with his responses too.
Charles Weld

London Gas Engineer

Radiator replacement
Boiler replacement
Radiator Installation
Radiator flushing
Fixing cold radiators
General heating issues
Fixing leaky Pipes
Underfloor heating repair

Boiler Replacement London

There are four major types of boilers:

  1. Combination boiler:
    Combination or combi boilers are usually compact with 4-5 copper pipes connected at the bottom. It is not attached to any external pump or large hot water cylinder.
  2. System boiler:
    You can identify a system boiler by checking underneath. It usually comprises three copper pipes rather than the 5 in a combi. Besides, some also come with a hot water cylinder. You can see a pressure gauge at the front of the casing.
  3. Heat-only boiler: 
    Also known as a regular boiler, it has three copper pipes. Two at the top and one at the bottom. This is usually with a hot water cylinder, a cold water storage tank, and an external pump.
  4. Back boiler:
    Using old back boilers is not allowed in the UK unless you update them. Back boilers are often installed at the back of a gas fire.


All the above boilers (excluding back boilers) are available in condensing and non-condensing variants.

Generally, all boilers installed in England are now condensing given their high efficiency and cost-friendliness.

Boilers hold extreme pressure, flammable gas and high temperature, making them unsafe for DIY diagnosis. We don’t recommend you attempt to do any work on your boiler. You can only legally service a boiler on your own if you’re trained, competent, and accredited by Gas Safe.  If your gas boiler breaks down, make sure you reach out to a Gas Safe and accredited engineer.

Some work like re-pressurizing, resetting, bleeding air out from radiators, or changing thermostat batteries can be done by you. We would always recommend you call a professional plumbing and heating engineer instead of risking your safety. Most jobs need specialist tools, like a power flushing machine, radiator valves, or a thermal camera to view cold spots.

Call Fixcrowd to book a nearby boiler repair in London. You’ll need to arrange a gas-safe registered engineer when:

  • There is no heat at all
  • There is water leakage
  • Strange noises are coming from your boiler
  • The pilot light is off
  • The water pressure drops below the standard level
  • Radiators are not heating properly
  • There is sludge in the system
  • You can’t use your underfloor heating system


All gas appliances, including boilers, must be inspected at least once a year. You can flush a central heating system using two methods; power flush or clean each radiator individually.

A power flush is the fastest way to remove sludge and offer the best results.

Radiator cleaning is a time-consuming process. You’ll need to turn off the heating system, to avoid leaks or injury.

The costs of a radiator power flush can vary depending on the number of radiators, and the complexity of the model. Call the Fixcrowd team If you want to know how much a power flush or gas certificate will cost.

Gas Safety Certificate checks vary between £50 to £160 depending on the number of appliances you’re using. The engineer has to check your boiler for repair or replacement. The additional boiler servicing cost may add up to your main cost.

Get in touch with our team for the cost of the gas safety certificate today.

Boiler installations can be complex and depend on a few factors. Swapping a like-for-like combination boiler with another combi unit takes a Fixcrowd gas service engineer a few hours.

Installing a new boiler from scratch can take a day on average or two in some cases.

Fixcrowd can help you book same-day boiler repairs in London, including underfloor heating service, installation, and maintenance for residential, commercial and investment properties.


Landlords must provide gas safety certificates to their tenants every 12 months. You can book an urgent annual gas safety check today. Call us or book online for availability.

Note:  Homeowners don’t have to renew their gas certificates annually unless they offer lodging services. However, we recommend you get your gas safety checks annually for personal and environmental safety. You can contact your local authorities for any compliance questions.

You also need a boiler installation certificate which ensures your boiler is clean and working.

If your heating system is working fine, you will only need a power flush every 5 to 6 years. This prevents damage to metallic components and flushes out sludge buildup and blockages.

Fixcrowd engineers are just a call away. Our on-call emergency plumbing services cover residential, commercial, and investment properties. Our services cover installing and fixing bathrooms, sinks, dishwashers, showers, gutter repairs, burst pipes, radiator installation, and more.

Fixcrowd is the best destination for boiler repair services in London. Our staff are highly professional and reliable, giving you peace of mind when it comes to boiler repair. Fixcrowd offers boiler repair solutions at competitive and affordable prices, with same-day service available. Our work is backed by our commitment to customer satisfaction, so you can rest assured your boiler will be repaired quickly and reliably. With more than 10 years of experience, we can tackle any boiler repair problem efficiently and fast.

Our team of experienced technicians specialize in boiler repair and provide solutions for a range of boilers, from gas, to electric boilers. We are dedicated to providing quality work and excellent customer service, so that you can count on Fixcrowd for all of your boiler repair needs in London. Our technicians will assess your boiler for any potential issues, as well as perform any necessary repairs. We also provide maintenance services to help prolong the life of your boiler.  

Fixcrowd is the best option for boiler repairs in London. We have the experience, tools, and knowledge required to repair your boiler efficiently and cost-effectively. We use the latest and most reliable methods to diagnose and repair your boiler. Our boiler repair services are quick, skilled and efficient, so you can get your boiler back up and running in no time. We can also provide emergency boiler repair services in London, helping to keep your boiler functioning properly when you need it most.

From boiler maintenance to full replacement, Fixcrowd provides a range of boiler repair services in London. Our team of professionals have the necessary skill and knowledge to carry out any kind of boiler repair task, no matter how large or small. With our boiler repair services, you can rest assured that your boiler will be in safe, reliable hands. With Fixcrowd’s boiler repair services, you won’t have to worry about expensive boiler repair bills or unreliable service.

At Fixcrowd, you can trust us for all your boiler repair needs in London. Our experienced and dedicated professionals will strive to give you the best boiler repair service experience possible. We are committed to providing excellent customer service, so you can place your trust in Fixcrowd for all your boiler repair needs in London. Whatever your boiler repair needs, Fixcrowd guarantees a quick, reliable, and cost-effective solution.

At fixcrowd, we offer a diverse range of services in London. These services include Heating & Gas, Plumbing & Drainage, Electrical, Painting & Decorating, Bathroom Fitting, Kitchen Fitting, Landscape Gardening, and Handyman. 

Boiler repair can be classed as an emergency in certain situations. For instance, if the boiler is leaking gas or water, it can pose a severe safety risk to your home and family. In such cases, immediate boiler repair is necessary to prevent further damage or harm. If you suspect a gas leak or water damage, make sure to turn off the boiler and contact a professional boiler repair technician as soon as possible. A quick response is vital in emergency boiler repair situations. 

Whether it is worth repairing a boiler depends on several factors, including the age and efficiency of the boiler, the cost of repair, and the frequency of previous repairs. If the boiler is relatively new and the repair cost is low, it might be worth repairing it. However, if the boiler is old and has required frequent repairs in the past, it may be more cost-effective to replace it with a newer, more efficient model. Before deciding, consult with a boiler repair expert to evaluate the condition of your boiler and determine the best course of action. 

A boiler repair engineer is a qualified professional who specializes in diagnosing and fixing problems with boilers. Their primary responsibilities include inspecting boilers to identify issues, performing necessary repairs, and ensuring the safe and efficient operation of the system. Boiler repair engineers also conduct routine maintenance to prolong the life of the boiler and prevent future issues. They have extensive knowledge of boiler systems and components, allowing them to provide expert advice and guidance on boiler repair and maintenance. 

Some common boiler issues to be aware of include: 

  1. Strange noises: If your boiler is making unusual noises, such as banging, whistling, or gurgling sounds, it may indicate a problem that requires boiler repair.
  2. Leaks: A leaking boiler can lead to water damage and mold growth. If you notice any signs of leakage, contact a boiler repair technician immediately.
  3. Inconsistent heating: If your boiler is not providing consistent heat throughout your home, there could be an issue with the thermostat, radiators, or the boiler itself, necessitating boiler repair.
  4. Pilot light problems: A malfunctioning pilot light can cause the boiler to shut down. If you have difficulty relighting the pilot or it keeps going out, seek boiler repair assistance.
  5. Loss of pressure: If your boiler’s pressure is consistently low, it may be a sign of a leak or an issue with the pressure relief valve, both of which require boiler repair.


You may need boiler repairs if you notice any of the following signs: 

  1. Your boiler is not heating your home adequately or evenly.
  2. The boiler is making strange noises or emitting odd smells.
  3. There is a visible leak or signs of water damage near the boiler.
  4. The boiler’s pressure is consistently low or fluctuating.
  5. The pilot light is frequently going out or difficult to ignite.


In any of these situations, it is essential to consult a boiler repair expert to diagnose and fix the issue promptly. Regular boiler maintenance can help prevent many of these problems, ensuring that your boiler operates efficiently and safely. It is recommended to schedule an annual boiler service with a qualified boiler repair engineer to inspect, clean, and maintain your boiler system. This proactive approach will help you identify potential issues early and minimize the need for boiler repairs in the long run. 

Being aware of the common issues that can arise with boilers and knowing when to seek professional boiler repair assistance is crucial for maintaining the safety and efficiency of your home heating system. Regular boiler maintenance, coupled with timely boiler repairs when needed, can help prolong the life of your boiler and provide you with peace of mind. Keep the boiler repair engineer’s contact information handy and don’t hesitate to reach out to them if you notice any signs of trouble with your boiler.

Upgrading to a new boiler in the UK can be worth it for several reasons. New boilers are often more energy-efficient, which can lead to reduced heating costs over time. They may also come with improved safety features and better performance. If your current boiler is old, unreliable, or inefficient, investing in a new one can provide long-term benefits in terms of comfort, energy savings, and potentially increasing the value of your property.

The lifespan of a boiler in the UK can vary depending on several factors, such as the type of boiler, its quality, usage patterns, and maintenance. On average, a well-maintained boiler can last between 10 to 15 years. However, some boilers can last even longer with proper care. Regular servicing, prompt repairs, and adherence to manufacturer’s guidelines can help extend the lifespan of your boiler and ensure its optimal performance.

Yes, a qualified plumber can typically replace a boiler. Boiler replacement requires specialized knowledge and expertise to ensure proper connections, safety measures, and compliance with building regulations. It is important to hire a professional plumber who is Gas Safe registered (in the UK) to carry out the replacement. They will have the necessary skills, training, and certifications to handle boiler installations safely and effectively. Hiring a reputable and experienced plumber will help ensure that the replacement is done correctly and meets all necessary standards.

Yes, modern boilers come with energy-efficient features. Upgrading to a high-efficiency boiler can not only reduce energy consumption but also contribute to lower utility costs over time. A professional assessment can help determine the best energy-efficient solution for your home.

If it's time for a new boiler, whether it's a replacement or an upgrade, our experienced team is here to assist you. Contact us with your inquiries and let us guide you through the process of boiler replacement in London.

Heating Engineer Near Me

Our mission is to provide the best heating services in the city of London. Fixcrowd Gas Safe Engineers can reach any postcode within the M25.