How often should a boiler be serviced?
As a homeowner, you should have your boiler professionally serviced once every 12 months by a Gas Safe registered engineer. Keeping to a strict yearly schedule is the most effective way to prevent unexpected breakdowns, especially during colder months when your system is under the most strain. By proactively checking your system every year, minor mechanical wear can be identified before it escalates.
Why we advise an annual service for your boiler
At Glow-worm, we advise that you have your boiler serviced every 12 months. This yearly check-up allows us to verify that your system is performing correctly and helps an engineer identify any potential wear and tear before it results in a costly repair. Beyond just ticking a box for your maintenance records, a regular service provides the peace of mind that your home's most essential appliance is operating as it should.
For homeowners in the UK, there are several reasons why yearly servicing is important:
Safety
Our boilers have multiple safety features which work hard to ensure that if your boiler was to stop working, it is still safe. By not having your boiler serviced, it increases the chances that it will not work correctly, and reduces the efficiency which can lead to frequent breakdowns.
During a service, a qualified engineer will perform a rigorous inspection of your system to check for gas leaks, ventilation issues, and other vital safety concerns.
Efficiency
Over time, dirt and debris can naturally build up inside your boiler's heat exchanger. This causes your system to work much harder to produce the same amount of heat, which quickly increases your energy consumption and monthly bills. Regular servicing helps keep your Glow-worm boiler running at peak efficiency, ensuring you get the most heat for your money while keeping your heating costs as low as possible.
Reliability
Annual checks allow engineers to identify worn components, such as seals or pumps, before they actually fail. This preventative maintenance significantly reduces the risk of unexpected breakdowns during the colder months when you need your heating most. By catching small issues early, you can avoid the stress of a cold home and higher emergency repair costs.
Guarantee protection
Like Glow-worm, most boiler manufacturers require annual servicing to keep your guarantee valid. This ensures that your system is being looked after according to our professional standards. Skipping a service could mean that if a fault does occur, your repairs are no longer covered, so keeping up with your yearly schedule is the best way to protect your investment.
To arrange your next annual service or to find a local Gas Safe registered engineer, please visit myGlow-worm Web.
Is an annual boiler service really necessary?
A common question homeowners ask is: "Do I really need to service my boiler every year?"
Technically, your boiler may still run without an annual service, but skipping one can lead to several risks.
Many modern boilers contain many moving parts and internal components that experience wear over time. Without regular inspections, small issues can go unnoticed until they cause larger and more expensive problems.
Annual servicing helps ensure:
✔ Component wear is reduced
✔ The boiler functioning is at correct levels and efficiencies
✔ All parts of the system are working correctly, including flues, filters and radiators
✔ The chances of boiler lockout are greatly reduced.
In short, yearly servicing is a simple way to protect both your heating system and your household.
What happens during a boiler service?
During a boiler service, a qualified heating engineer will perform a series of safety and performance checks.
While the exact process may vary slightly depending on the model, a typical boiler service includes:
When is the best time to service your boiler?
While you can service your boiler at any time of year, the best time is usually late spring or summer.
During warmer months:
- Heating engineers typically have greater availability
- You’re less likely to rely heavily on heating
- Potential issues can be fixed before winter arrives
Booking your service early helps ensure your boiler is ready when colder weather returns.
How long does a boiler service take?
A typical boiler service usually takes between 30 minutes and one hour.
However, this can vary depending on several factors, including:
- The type of boiler (combi, system or regular)
- The age and condition of your boiler
- Where is boiler is sited e.g. loft
- Whether any issues are identified during the inspection
How much does a boiler service cost in the UK?
The cost of a boiler service in the UK typically ranges between £70 and £150, although prices can vary depending on location and the type of boiler.
Factors that may affect the price include:
- The complexity of the boiler system
- Local engineer rates
- Whether the service is part of a maintenance plan
Some homeowners choose to take out a boiler cover or servicing plan, which spreads the cost across monthly payments and may include emergency repairs.
Although servicing does involve a small upfront cost, it can help prevent far more expensive repairs in the future. Our Glow+ smart home subscription offers a proactive way to keep your boiler performing at its best. Available to customers with compatible smart controls and a MiGo Link internet gateway, it includes remote monitoring, online diagnostics and regular boiler health reports to help identify potential issues early.
If your boiler has not been routinely serviced, you may start to notice warning signs such as unusual noises, inconsistent heating or hot water, rising energy bills, or your boiler switching off unexpectedly. These issues can indicate underlying faults that may worsen over time if left unchecked. If you’re experiencing any of these problems, it’s best to book a boiler repair with a Glow-worm engineer to diagnose and fix the issue before it gets worse.