If you’re searching for Boiler Repair in London, you’ve come to the right place. At H3GS Heating & Cooling, we understand howdisruptive a broken boiler can be—especially during cold weather. With more than 15 years of experience and a team of GasSafe Registered engineers, we offer prompt, professional, and reliable boiler repairs across London. Whether it’s a gas boiler, a combi boiler, or a system boiler, we’ve seen it all—and fixed it all. Our team is available for same-day boiler repair in London, ensuring your comfort is quickly restored. Moreover, our service includes an emergency boiler repair in London, perfect for those unexpected breakdowns.
When it comes to reliable and quick boiler repair services in London, our commitment to excellence sets us apart. We combine technical expertise with a personal touch. You won’t just get your heating fixed—you’ll get a solution that lasts.
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Andrei ATrustindex verifies that the original source of the review is Google.
Amir and his team did a great job replacing my boiler, and identified and fixed some other key safety issues with our gas flues that had not been picked up in previous gas safety inspections. Very good communication, transparent pricing and high quality work - would definitely recommend them!Posted on Google![]()
Carmen MartinezTrustindex verifies that the original source of the review is Google.
Amir and Hamed made a fantastic job in my flat. I needed to replace my old vented water cylinder by a new unvented one. The espace was quite tight and I also wanted to accommodate the washing machine in the same area. They managed to fit everything! Really happy with the result and the communication. Totally recommended. Really well done job and on time.Posted on Google![]()
dave pasolaTrustindex verifies that the original source of the review is Google.
We have used H3GS to install a new boiler and also an upgrade on the gas pipe run. On both occasions they have delivered a great service within cost and time. They work hard, tidily and very respectfully of the customer and their needs. I have no hesitation in recommending them to anyone who needs heating work done. They are also very trustworthy and can be left alone in a house.Posted on Google![]()
TobyTrustindex verifies that the original source of the review is Google.
H3GS have completed a few different jobs for us over the past couple of years, including sealing our heating system, servicing our boiler and replacing a motorised valve that was letting through. I can highly recommend H3GS. Amir is really friendly, professional, responsive and reliable. All of the work has been clearly explained and costed beforehand, and carried out on time and within the agreed budget. Thanks very much !!Posted on Google![]()
althea McCourtTrustindex verifies that the original source of the review is Google.
We appreciated H3GS’s prompt response to our urgent pipe leak. Amir quickly identified and diagnosed the problem, and the team carried out the repairs efficiently and professionally. They were also very considerate of our elderly mother who was at home during the work. We would be happy to recommend H3GS to others.Posted on Google![]()
Iulian GelepuTrustindex verifies that the original source of the review is Google.
Very quick, efficient and professional.Posted on Google![]()
Aziz Abdul-MalikTrustindex verifies that the original source of the review is Google.
I have used H3GS a few times now. For the first time, I had an emergency and they were quick to review the pictures and videos I sent them to determine what the likely issue was. I was fortunate that they were able to do the repair on the same day. I had another issue with my boiler due to a leak and they were quick to advise me about the possible issues with the boiler as well as the danger that the boiler was in due to it breaking through the floor. They were able to fix the problem within a few days as it wasn't a straightforward fix. Every time I have used them, there has always been a preliminary assessment via pictures and videos, which has helped them analyse the issue in the first instance to reduce the delay on an onsite analysis. This has meant that they have arrived at the job prepared. Amir's communication is always polite and concise and I have always received a prospective quote for the job once an onsite analysis of the problem has been done. I highly recommend them and will continue to use them for any future plumbing problems that I have.Posted on Google![]()
Felicia SamuelTrustindex verifies that the original source of the review is Google.
Absolutely amazing company! We have been using them since they installed our boiler. They service our boiler annually and we have NEVER had any problems. If you want an efficient, friendly and professional service this company is the one to choose 👌🏾Posted on Google![]()
Birju PrajapatiTrustindex verifies that the original source of the review is Google.
Excellent comms, clear pricing, efficient work. Will definitely be using them again. Thanks guysPosted on Google![]()
Leopold OakesTrustindex verifies that the original source of the review is Google.
Fast and professional service. Will use again in the future.
Routine servicing can save you from future costly repairs. We provide:
Fast leak detection and permanent solutions.
Diagnosing faulty thermostats, pumps, or valves.
Fixing kettling, whistling, or banging sounds.
Identifying and resolving system pressure loss.
Troubleshooting gas flow or thermocouple issues.
Need urgent help? Want to book a service? Contact H3GS Heating & Cooling now for expert boiler repair in London. Let our team restore your heating quickly, safely, and affordably.
Common signs include no heat/hot water, leaking, loud noises, low pressure, or the pilot light going out.
Yes, we provide same-day and 24/7 emergency boiler repair across London.
Costs vary based on the issue, but we offer free online estimates and competitive pricing.
Yes, our engineers are trained to repair all makes and models of gas boilers.
Absolutely. Annual servicing keeps your boiler safe, efficient, and under warranty.