If you’ve never had a boiler service and wondered what actually happens, you’re in the right place. Homeowners often ask us what it involves, how long it takes, etc, and as far as we’re concerned, there are no daft questions.
During a boiler service, a Gas Safe registered engineer carries out safety checks, inspects and cleans internal components, checks gas and boiler pressure, and ensures your boiler is running safely and efficiently. It helps prevent breakdowns and keeps energy bills manageable and warranty valid.
In this guide, we’ll explain why boilers need servicing, what an annual boiler service involves in more detail, and why regular boiler servicing is important to protect their life and efficiency.
At JPS Plumbing, Gas and Electrical, we’ve serviced thousands of boilers across the Winchester and Southampton areas. Our friendly heating engineers not only carry out efficient boiler services, but can also give you honest advice about choosing a new boiler when the time comes. Contact us today for advice.
Why does a boiler need servicing?
Your boiler is one of the most important appliances in your home and a fairly complicated bit of machinery. Just like your car, it needs regular maintenance to keep running smoothly.
Most importantly, an annual service keeps your boiler running safely. Gas appliances can develop leaks if left unchecked, and carbon monoxide is extremely dangerous. Your Gas Safe-registered engineer will carry out safety checks to keep you and your family safe, as well as warm.
Over time, essential components like the heat exchanger, ignition electrodes, and safety devices can wear, clog, or become misaligned.
Servicing your boiler annually is essential; otherwise, you might find that:
- The boiler’s efficiency drops
- Your energy bills start to rise
- You’re faced with expensive repairs
- Your boiler breaks down completely
And nobody wants to be left without heating and hot water, especially in winter.
Is a boiler service legally required?
If you are a UK homeowner, an annual boiler service is not a legal requirement, but that doesn’t mean you should skip it. Most manufacturers demand an annual service to keep the warranty valid. So, miss a service, and you could find yourself paying for repairs that would otherwise be covered.
If you’re a landlord, a Gas Safety Certificate is a legal requirement, which means you need an annual check by a Gas Safe-registered engineer for all gas appliances and flues. We would recommend doing the service at the same time to keep costs and disruption to a minimum.
What does an annual boiler service involve?
Before the service
Before we discuss what happens during a boiler service, here are a few simple steps to ensure a smoother service and that your engineer can work efficiently and safely.
- Clear the space around the boiler to make sure it’s easy to access, especially if it’s in a cupboard, loft, or garage.
- Make sure someone over 18 is at home.
- Keep previous service records handy (if you have them, if not, don’t worry).
- Don’t panic about turning the boiler off; your engineer will handle everything when they arrive.
- Keep pets secure for everyone’s safety: yours, ours, and your pets.
During the service
Here’s what you can expect when you book your boiler’s yearly check-up with JPS Plumbing, Gas and Electrical.
Our friendly Gas Safe engineer arrives and will start with a visual inspection of the boiler’s key components.
This includes checking:
- The flue
- Boiler casing
- Pipework
- Adequate ventilation
- Visible corrosion
- The condensate pipe (if applicable)
Next, we check:
- Boiler pressure
- System pressure (to keep water flowing around radiators properly)
- Gas pressure to ensure it’s at the correct pressure
- Safety devices to confirm the boiler will shut down safely if needed
We’ll remove the boiler casing to inspect and clean key internal components, including the heat exchanger and ignition electrodes. This prevents soot and debris from affecting performance and helps maintain your boiler’s health.
We also check the expansion vessel, seals, and connections, making any necessary adjustments to keep the boiler running efficiently and safely.
Once the checks are complete, we’ll run a final check to ensure everything is working as expected. We’ll listen out for any unusual noises, make sure the heating and hot water come on and make any adjustments as necessary.
Before we leave, you’ll receive a service report explaining what we’ve done and whether any future work may be needed.
After the service
It’s important to note what’s not included in a boiler service, too, which is repairs and replacement parts. If they are required, we will provide you with a clear quote for your approval and book the work in for a later date.
How long does a boiler service take?
A gas boiler service typically takes 30–60 minutes, but this can vary depending on the type of boiler, its age, and the condition it’s in.
Older boilers or those that haven’t been serviced for a while may take a little longer, as they are likely to need more cleaning and adjustments.
But rest assured, at JPS, we never rush a boiler service and will always make time to answer your questions. We’ll do our best to be efficient without disrupting your day, but we will be thorough to ensure we leave you with a safe and healthy boiler.
Can regular boiler servicing extend your boiler’s life?
You bet. They aren’t cheap to replace, so having your boiler regularly serviced is important to extend its lifespan.
A boiler that’s serviced every year will experience less strain on its main components, is less likely to break down and will run more efficiently, keeping your bills to a minimum. Regular servicing also reduces the risk of unexpected repair costs.
When is it time to get a new boiler?
Even with regular servicing, no boiler lasts forever. Signs it may be time for a new boiler include:
- Frequent boiler repairs are needed
- Your bills are on the up
- Your heating system doesn’t work as well as it should
- You hear unusual noises
- Your hot water is unreliable
Most boiler manufacturers design boilers to last around 10–15 years. If yours is approaching this age and becoming unreliable, upgrading to a new, efficient boiler can save money in the long run and improve comfort.
At JPS, we’re 100% transparent and honest. We’ll let you know if your boiler can be kept running safely and efficiently, or if replacement is the sensible option.
Book your annual boiler service with JPS Plumbing, Gas and Electrical today
An annual boiler service is one of the simplest ways to keep your home warm, safe, and energy-efficient. At JPS Plumbing, Gas and Electrical, our Gas Safe registered engineers deliver a professional service with years of experience, so you know you’re in safe hands.
Whether it’s a routine annual service or advice on your heating system, we’re here to help. For complete peace of mind, consider our boiler cover, which can include repairs and maintenance to both your boiler and heating system.
Contact us to find out more and book your boiler service today
Frequently asked questions about boiler servicing
Does a boiler service reduce energy bills?
Regular servicing improves efficiency, meaning your boiler uses less gas to heat your home. This will be reflected in your energy bills, helping you to save money.
What happens during a boiler service?
An expansion vessel is a small tank inside your heating system that absorbs pressure changes as water heats up. If it’s faulty or has pressure issues, boiler breakdowns are more likely. During a gas boiler service, we will check it thoroughly.
How often should you have your boiler serviced?
You should have your boiler serviced by a Gas Safe-registered engineer once a year. Not only will this keep it running efficiently and safely, but most manufacturers also require an annual service under the conditions of the warranty