Your boiler works hard through the colder months and, like any machine, it needs looking after. The short answer is that most boilers should be serviced once a year. Here is why that matters, what a service involves and how to get the most from it.
Why an annual service matters
A yearly service helps your boiler run safely and efficiently, and it gives an engineer the chance to spot small problems before they turn into breakdowns. A boiler that is cared for is more likely to keep working on the coldest day of the year, when you need it most.
Many manufacturers also ask for an annual service to keep the warranty valid, so it is worth checking your paperwork.
What a boiler service usually involves
The exact checks depend on the type of boiler, but a service usually includes:
- A visual check of the boiler and its connections
- Checking the flue and ventilation
- Testing that the safety devices work
- Checking the burner and heat exchanger, and cleaning where needed
- Checking the pressure and the controls
Ask your engineer to explain what they have done and what they have found. A good engineer will be happy to talk you through it.
Is a service the same as a gas safety check?
No. A service looks after the boiler itself and keeps it working well. A landlord's gas safety check is a separate legal check that gas appliances and flues are safe. Both matter, but one does not replace the other.
When is the best time to book?
Late spring or summer is a good time. Engineers are generally less busy, and you will not be without heating if a part needs ordering. Booking before the cold weather arrives is much better than waiting for a breakdown in the middle of winter.
How to prepare for the visit
- Clear the area around the boiler so that the engineer can reach it easily
- Have your boiler manual and any previous service records to hand
- Make a note of any problems, such as noises, leaks or radiators that do not heat up
- Make sure someone is home to give access
What happens if you skip a service?
Skipping a service does not mean your boiler will fail straight away. But small faults can go unnoticed, the boiler may use more fuel than it should, and a problem with the flue or burner could become a safety risk. A breakdown in winter is also usually more disruptive and more costly than a planned visit.
Signs your boiler needs attention sooner
- Strange noises such as banging, whistling or gurgling
- Radiators that stay cold or have cold patches
- Pressure that keeps dropping
- Water leaking from the boiler or pipework
- The boiler switching itself off or needing frequent resets
- Where you can see the flame, a yellow or orange flame instead of a blue one
Do not try to repair a gas boiler yourself. If you notice any of these signs, switch the boiler off and call a qualified engineer. If you smell gas or suspect a carbon monoxide leak, follow the advice in our gas safety guide.
Need a hand?
We install, repair and look after boilers and heating systems. Take a look at our heating and boilers service or get in touch and we will talk it through with you.