Annual Boiler Service

Call on 020 8355 0840. Top Heating and Plumbing Services in North London

MML Plumbing trustpilot reviews

Over 15 years of experience

Boiler Service

Fixed Price
Accurate diagnosis
We strive to provide same-day service to ensure we are with you as quickly as possible.


Project Finished


Years in the industry


New boiler installed


New home plumbing installation

Is it necessary to have an annual boiler service?

If you own a home or are a landlord, the central heating boiler in your property requires careful attention. It can be frustrating when boilers suddenly stop working, especially during the cold winter months. Going without hot water and heating during the winter can cause significant disruption for any family.

That’s why it is crucial to regularly check and maintain the functionality and energy efficiency of your boiler. One way to achieve this is by scheduling an annual boiler service. By having your boiler serviced each year, you can identify any potential issues early on and address them promptly. Additionally, depending on your requirements, you can also consider obtaining boiler insurance coverage.

annual boiler service

Get a Free Boiler Installation Quote Today

Ready to upgrade your home’s heating system? Get a free quote today for your boiler installation in North London and enjoy a cosy, energy-efficient winter. Don’t wait—click below to get your fixed prices in minutes!

Why Do You Need to Service Your Boiler Every 12 Months?

The more you maintain your boiler, the longer its life will be. And we all know that safety is a top priority for everyone. Make sure to get your appliance checked out by an experienced boiler expert who can identify and prevent it before it becomes a serious hazard!

Boiler performance

You want to be comfortable in the cold and have a warm home without paying high energy bills through the nose. You can achieve this by regularly servicing your boiler with our boiler experts. A well-maintained system will provide you with comfort during colder months while also saving on energy costs all year round.


Any major boiler issue can put lives at risk. Carbon monoxide is a silent killer. Make sure you install a carbon monoxide alarm close to the boiler and maintain your appliances regularly.

Longer boiler life

Annual boiler servicing will increase the appliance performance and also our boiler technicians can discover minor boiler problems. Cleaning out the heat exchanger and burner will increase the boiler’s performance and save you money on energy bills in the long run.

Keep the guarantee

To keep your boiler guaranteed all manufacturers recommend annual servicing. Get your boiler serviced every year by our gas-safe registered engineers to keep your boiler warranties. Your appliance guarantee will be void without a yearly boiler service. If you need to make an insurance claim, this is the only way to go about it!

our gas engineers

WHY US – MML Plumbing, your local professionals!

Fast Response
Local boiler service engineers
Reputable local business
Knowledgeable and friendly office support.
Qualified plumbers, heating engineers and a qualified gas-safe engineer!
Fixed rates and no surprises at the end of the work.
Fast solutions.
24-hour online help & quotation.

Reviews from Our Valued Customers

Claudine de Montule
Claudine de Montule
Great and efficient boiler service, fixed price so no surprises. Very professional
Danuta Miloszewski
Danuta Miloszewski
Used MML Plumbing for the first time today. Administrator in office was easy to deal with, efficient and helpful. Plumber arrived on time as arranged, fixed the problem and explained what he had done. Quick, tidy and courteous worker. What I also especially liked was that I was given an actual confirmed time when he would arrive and not one of those two or three-hour 'window slots'!
Charles V
Charles V
MML Plumbing successfully completed the installation of our heating system in our expansive 8-bedroom residence. The placement of the boiler and cylinder was expertly executed in the basement. They meticulously laid new piping throughout the house to facilitate radiators and hot/cold water faucets. The recent commissioning of the system has resulted in its exceptional functionality. Their impeccable organization and absence of any delays were notable. We definitely plan to engage their services again in the future.
Roger Packham
Roger Packham
MML were extremely responsive and accomodating through out. They understood my needs and were solution focused through out the job. I found them so easy to work with and would definitely use them again. Thank you MML.
Agnes Meszaros
Agnes Meszaros
Fast, professional, high quality service at a very reasonable price. I’m really glad I found them.
Henry Smith
Henry Smith
In North London, it can be hard to find a company that you can trust and provide quality work. We called MML Plumbing to install a system boiler and a hot water cylinder. The installation was done in a few days, and now everything is fine. They left the area very clean. I highly recommend them.
Andrew Healey
Andrew Healey
I had a shower replaced. A great job, very satisfied with the work. Levi was friendly, helpful and efficient.
Jatin Modi
Jatin Modi
I have been a landlord for 15 years and used many labour staff in my years. I started to use MML 6months back and now used them 5 times: 1) They are always on time 2) They are respectful 3) I trust their quotes - they do not "make up work" 4) They communicate well on both email and text 5) They are very organised and polite I have dealt with so much domestic help over the years so i know the benchmark - MML are way above Jay (Camden)
MML fitted a shower. Good price, courteous and thorough communication and excellent standard of work. I will call them again if I have plumbing related work
Hollie Davies-Smith
Hollie Davies-Smith
⭐⭐⭐⭐⭐ I am thrilled to leave a 5-star review for MML Plumbing's advanced leak detection services. They were able to find a leak that three other plumbers had missed. Their use of thermal imaging and acoustic leak detection tools set them apart from other companies in the area. What impressed me the most was their commitment to resolving the issue without causing unnecessary damage, while other companies suggested tearing apart my ceiling. Their services are not only effective but also affordable.They are a reliable and trustworthy company that goes above and beyond to solve plumbing problems. Thank you, MML Plumbing, for your expertise and exceptional service. I will definitely turn to you for any future plumbing needs. Hollie xxx


Our team is highly trained, and we pride ourselves on going the extra mile to make sure your Vaillant, Worcester-Bosch, Baxi, or Ideal is running in tip-top shape. Think of us as an annual service plan for your home.

These are the steps we carry out on a boiler service:

  • Visual check for any sign of spillage.
  • Flue inspection and termination – flue joints have to be visible for inspection.
  • If it’s necessary we clean the burner, heat exchanger, injector, and combustion chamber.
  • Checking the seal integrity
  • We check the safety operation.
  • We test the operation in heating and hot water mode
  • We top up the pressure in the system.
  • We carry out a gas rating test to check the correct operation
  • After the inspection, we can confirm that your boiler is up to safety standards. We also take note of everything.
  • We check the minimum gas pressure.
  • We carry out a combustion analysis to check the perfect operation. This is the most important part of our annual service.
  • The flue integrity.
  • We clean your condense trap and magnetic filter.
  • The final step will be a gas tightness test, so we can ensure all the joints are tight and there is no leak.
  • We check your appliances for up to 3 appliances.
  • We also give you advice on how you can improve the heating system efficiency.
  • We fill up your benchmark in the manual which shows that the safety checks were carried out by a qualified gas safe engineer. If you ever have to claim on your boiler you have the details that you maintained it every year to a high standard.

What’s not included in this service?

This service is not intended for boiler breakdowns; it is a separate service. If your appliance is not functioning, you will need to schedule a breakdown visit first. The boiler must be in working order for the testing to be carried out.

Any congestion charge or parking fees incurred will be added to the final bill unless a parking permit for the duration of the visit is provided.

Certificates are not included. Each certificate is an additional – £15+VAT

gas safe
we are gas safe register

How to contact MML Plumbing? – Book your service today.

Call us on 0208 355 0840 to book a boiler service.
You can book online, via email:!

For emergency leaks contact the National Gas Emergency Service.
If you thinking about installing a brand new boiler call us on 020 8355 0840 and book an installer for an estimate. Read our boiler installation service guide.

Protect your boiler and heating system!


Once you decide to contact us, you will see the difference. Almost instant reply, friendly customer service, fast booking, reasonable rates and gas-safe registered professionals.

Once we visit you, we will give you an honest opinion on your boiler and you will receive detailed advice for the future.

Our highly-skilled boiler engineer group is certified, gas-safe registered and insured and qualified engineers will work on your property to ensure you receive the very best customer service. If you are in the Barnet area and need boiler service call MML Plumbing and let’s discuss your options.

boiler certificate

Frequently Asked Questions

Reliable Boiler Service


Book your annual boiler service with us today!

Professional local boiler engineers. Book your work for domestic and commercial properties.

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