Call us today:A yearly boiler service keeps your heating safe, efficient, and reliable when you need it most. It also protects your manufacturer warranty and helps catch small issues before they turn into costly breakdowns.
In this guide, you will learn exactly what we check during an annual boiler service, how to prepare for our visit, and why booking ahead of winter is a smart move.
How often should a boiler be serviced?
Boilers should be serviced once every 12 months. Annual servicing is recommended by manufacturers and is often required to keep your warranty valid.
Regular servicing ensures your boiler runs safely and efficiently, reduces the risk of winter breakdowns, and helps control energy costs.
If you have just moved home, inherited a system with no service history, or recently had building work done, it is best to book a service as soon as possible and then maintain an annual schedule.
What does a boiler service include?
A professional boiler service is far more than a quick inspection. Here is what our engineers check during a standard annual visit.
Gas leak tests and safety checks
We carry out a gas tightness test to ensure there are no leaks on accessible pipework. We also check ventilation, safety devices, and the condition of seals and casing.
Flue and combustion performance
We inspect the flue to ensure it is correctly installed, unobstructed, and safely discharging outside. Using a calibrated analyser, we test combustion levels to confirm the boiler is operating efficiently and within manufacturer tolerances.
If readings fall outside safe limits, we identify and correct the issue.
Cleaning key boiler components
We inspect and clean key internal components such as the burner, heat exchanger, condensate trap, electrodes, and magnetic filter (if fitted). This helps improve efficiency and extend the life of your boiler.
Pressure and system checks
We check boiler pressure, expansion vessel charge, and look for any signs of leaks. For sealed systems, we ensure pressure is within the recommended range and advise if adjustments are needed.
Controls and safety devices
We test thermostats, timers, and smart controls to ensure your heating works when you need it. Safety devices such as flame detection and overheat protection are also checked.
Pipework and installation inspection
We visually inspect accessible pipework, valves, and joints, checking for corrosion, poor circulation, or installation issues.
Radiator and heating system checks
Radiators are included in our standard checks. We look for cold spots, trapped air, and uneven heating, and advise on bleeding, balancing, or further maintenance if required.
For a more in-depth system check, including balancing or power flushing, we can arrange a full maintenance visit.
You will receive a clear service report outlining findings, any adjustments made, and recommendations to keep your system running efficiently.
What are the benefits of an annual boiler service?
Improved safety
Routine servicing reduces the risk of carbon monoxide issues and ensures your boiler is safe to operate.
Better efficiency
A clean and correctly adjusted boiler uses less fuel, helping to lower your energy bills.
Greater reliability
Identifying worn or failing parts early helps prevent unexpected and expensive breakdowns.
Warranty protection
Most manufacturers require annual servicing by a qualified engineer to keep warranties valid.
How to prepare for a boiler service
A few simple steps help us complete your service quickly and safely.
- Clear access around the boiler (airing cupboard, kitchen, or utility space)
- Ensure the external flue terminal is visible and accessible
- Have your service history and boiler manual ready
- Leave power and water supply on
- Keep pets away from the work area
- Make note of any recent issues (noise, pressure loss, error codes)
Do engineers check radiators during a boiler service?
Yes — radiators are visually checked as part of a standard boiler service.
If we find cold spots, poor circulation, or faulty valves, we will recommend the most effective solution. This may include bleeding, balancing, adding inhibitor, or a system flush if sludge is present.
If your heating system needs more attention, we can carry out a full central heating maintenance service.
Do oil boilers need servicing?
Yes — oil boilers should also be serviced annually.
Oil servicing includes additional checks such as oil line condition, filter cleaning or replacement, nozzle inspection, and combustion testing to manufacturer specifications.
If you are looking for a local service, we provide oil boiler servicing in Lincolnshire.
When is the best time to book a boiler service?
The best time to book your boiler service is during spring or summer.
Engineers are less busy, parts are easier to source, and you avoid the winter rush when breakdowns are more common.
If you have not yet booked, do not wait — demand increases significantly during colder months.
Boiler service checklist before your engineer arrives
- Clear at least one metre of space around the boiler
- Ensure flue access is clear outside
- Unlock gates or access routes if needed
- Have service records and warranty details ready
- Ensure power is on and controls are working
- Note any recent issues or faults
- Keep pets safely out of the way
Signs your boiler may need attention sooner
- Frequent pressure drops
- Kettling or whistling noises
- Soot marks or unusual smells
- Radiators slow to heat or with cold spots
- Higher than normal energy usage
If you notice any of these issues, it is best to book a service or diagnostic visit as soon as possible.
Book a boiler service in and around Spalding
We are a Gas Safe registered team providing reliable boiler servicing across South Lincolnshire from our base in Spalding.
Whether you need a routine annual service or repairs, we offer clear communication, tidy workmanship, and honest advice.
If you want predictable costs and priority support, take a look at our Spalding boiler service plan.
If your boiler is older or unreliable, we can also provide a quote for a new boiler installation in Spalding.
Ready to book your boiler service?
Call 01775 550 135
You will receive a thorough service, a clear report in plain English, and practical advice to keep your heating running safely and efficiently all year round.