Your boiler works hard for you every single day. It heats your water, warms your radiators and keeps your home comfortable through the worst of British weather. But when was the last time you actually had it serviced?
If the answer is “I can’t remember” or “never”, you are not alone. Many homeowners in London only think about their boiler when it stops working. By then, the damage is often done and the repair bill is far higher than a routine service would have cost.
The Short Answer: Once a Year
Most boiler manufacturers and heating engineers recommend annual servicing. That means once every 12 months, without fail. Here is why:
- Safety — A poorly maintained boiler can leak carbon monoxide, a colourless, odourless gas that kills. An annual service includes a carbon monoxide safety check.
- Warranty — Almost every boiler manufacturer requires annual servicing to keep your warranty valid. Skip a service and you could void years of cover.
- Efficiency — A well-serviced boiler runs more efficiently, which means lower gas bills. Even a small drop in efficiency adds up over a full winter.
- Reliability — The best way to avoid a breakdown on the coldest night of the year is to catch problems early. A service picks up worn parts before they fail.
What Happens During a Boiler Service?
A proper boiler service from a Gas Safe registered engineer typically takes 30 to 60 minutes and includes:
- Visual inspection — Checking the boiler, flue, pipework and controls for signs of wear, corrosion or damage.
- Removing the casing — Opening the boiler to inspect internal components like the heat exchanger, burner and fan.
- Cleaning — Removing any debris, dust or sludge that could affect performance.
- Testing controls — Making sure the thermostat, timer and safety devices are all working correctly.
- Checking gas pressure — Ensuring the gas supply and boiler pressure are within the correct range.
- Flue gas analysis — Measuring the emissions to make sure the boiler is burning gas cleanly and safely.
- Written report — You should receive a service record confirming what was checked and any issues found.
When Is the Best Time to Service Your Boiler?
The golden rule is to book your service in late summer or early autumn, before the cold weather hits. There are several good reasons for this:
- Availability — Engineers are less busy in summer, so you can get an appointment quickly.
- Preparation — Any issues found can be fixed before you actually need your heating.
- Cost — Emergency call-outs in winter are more expensive and harder to book.
That said, if your boiler has not been serviced in over a year, do not wait for summer. Book it now.
Do Landlords Have to Service Boilers?
Yes. If you are a landlord, you are legally required to have all gas appliances — including boilers — checked annually by a Gas Safe registered engineer. You must provide tenants with a copy of the gas safety certificate (CP12) within 28 days of the check.
Failure to comply can result in fines of up to £6,000 or even prosecution. DRMB offers combined boiler servicing and gas safety certificate packages for landlords across Lewisham, Blackheath, Greenwich and the wider SE London area.
Signs Your Boiler Needs Attention Between Services
Even with an annual service, keep an eye out for these warning signs:
- Unusual noises — banging, whistling or gurgling
- The pilot light keeps going out
- Radiators are cold at the top or bottom
- Your energy bills have increased without explanation
- The boiler keeps losing pressure
- There is a yellow flame instead of blue
If you notice any of these, do not wait for your next service. Contact DRMB and we will send an engineer to investigate.
How Much Does a Boiler Service Cost in London?
A standard boiler service in London typically costs between £80 and £120, depending on the type of boiler and your location. At DRMB, we offer competitive, transparent pricing with no hidden extras.
Considering that a new boiler installation can cost £2,000 to £4,000, spending £100 a year on servicing is a smart investment that can extend your boiler’s life by several years.
Book Your Boiler Service with DRMB
Whether you are a homeowner wanting to protect your investment or a landlord meeting your legal obligations, DRMB makes boiler servicing simple. Our Gas Safe registered engineers serve the whole of SE London, including Bromley, Catford, Eltham and Croydon.
Book your boiler service online or call us on 0208 123 4807.