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Heat Knights Boiler Repair London

Heat Knights Boiler Repair London

5.0(209 reviews)See reviews ↓·London

About the company

Heat Knights Boiler Repair London is a boiler and heating engineering company that has served London for over 20 years. The company is accredited by Vaillant and Worcester, and its engineers are Gas Safe registered, each with a minimum of 10 years' experience. Heat Knights offers a 10-year warranty on new boiler installations and a 12-month guarantee on boiler repairs and pipework.

It carries many common spare parts to solve issues without ordering parts and offers a one-hour response time. Services include boiler repair, boiler service, boiler installation, gas safety certificates, gas and water leak repair, central heating repairs, and drain unblocking.

What customers say

Based on genuine customer reviews

Rapid response and clear communication are the themes that recur most in feedback on this Harringay-based boiler and heating specialist. Simon, named repeatedly, is described as punctual, friendly and considerate, with several customers noting he diagnosed faults over the phone and arranged same-day or next-day visits. Reviewers highlight his patience when they hunted for boiler serial numbers and his willingness to explain problems without attempting to sell unnecessary extras. Installations of Vaillant boilers and Hive smart controls feature in accounts, as do repairs to MegaFlo systems and routine servicing, where an engineer spotted a fault missed during an earlier installation elsewhere.

One thing mentioned again and again is the care taken over the work itself, from neat boiler replacement to a thorough service. Customers also mention that communication remained strong before and after each job, and when an invoice error occurred it was corrected promptly once flagged. The team's ability to fit urgent work around a full schedule, completing a replacement within a day of a desperate call, is another recurring observation. Simon's investigative approach to a puzzling fault left one customer reassured by his evident experience.

Air conditioning contractorBoiler supplierGas engineerGas installation serviceHeating equipment supplierHVAC contractor

Reviews

Reviews are taken from publicly available sources.

KC
Kunal Chaudhuri8 July 2026

Great, professional boiler installation organised by Simon & at very short notice. Completed very quickly & with minimum fuss. Appreciate your work, guys!

OB
Ollie Brown24 June 2026

Heat Knights sorted a problem with our MegaFlo and did a thorough service (including spotting an issue from installation which other companies had missed). Great customer service, really easy to engage with. Thanks, Ollie

PM
Philippa Morgan15 June 2026

Great service! From start to finish came out to Hackney same day and repaired our broken boiler, really friendly chap too!

KD
karen davies8 May 2026

Simon attended very quickly to diagnose and repair our boiler. Great service and communication. Highly recommend.

NG
nathan goulbourne13 March 2026

Two weeks since the installation of a Valliant boiler and smart controls by the team at Heat Knights and I couldn't be happier - given the exceptional speed and engagement experienced from the very first phone call till the end of the job. After a desperate call to replace a failing boiler ASAP, the guys - despite being booked up - were able to cultivate time to get it sorted within 24 hours. ​Simon’s communication was A1 and on-point, responding instantly and proactively with any query I had throughout the process with a level of transparency that I had not experienced in a long time - if not ever! Kevin the engineer on site, handled the boiler installation and tricky flue installation that ran along the top of my bedroom with expertise and aplomb. I seldomly leave reviews, but I must say,, these guys deserve to be an exception. Highly recommend.

HB
Hannah Barnes8 March 2026

It's always worrying when something suddenly goes wrong with your gas, but Simon was fantastic. Even though he was extremely busy, he responded quickly and solved our problem in no time. Exceptional service, a great job, and very reasonably priced. We really can't thank Simon and the team enough.

RL
R.E.A London5 March 2026

They did the job well enough, easy to get hold of etc but it was expensive. Really this is based mainly on the £149 an hour call out rate which can quickly add up to a hefty bill. They don’t give you any warning that the price is likely to be significant so make sure you ask for a quote.

Boiler & heating engineers in London compared

Ordered by rating, weighted by the number of reviews — businesses with only a handful of reviews do not jump to the top automatically. 12 businesses in this category in London are compared.

RankProviderRatingReviewsOpen Sat.
1A&E Plumbing & Gas 24/7★ 5,0751Yes
2Heat Knights Boiler Repair London (this page)★ 5,0209Yes
3Green Gas London Stoke Newington★ 5,0162Yes
4Via Gas Engineering LTD★ 5,0157Yes
5Best Gas London Ltd★ 5,089Yes
Contact
+442030024997hkboilerrepairlondon.co.uk3, Omega Works, Harringay Warehouse District, London N4 1LZ
Working hours
Monday00:00–24:00
Tuesday00:00–24:00
Wednesday00:00–24:00
Thursday00:00–24:00
Friday00:00–24:00
Saturday00:00–24:00
Sunday00:00–24:00