Your boiler is undoubtedly a vital appliance, helping to keep you and your family warm and giving you hot water when you need it. Thankfully, high quality modern gas condensing boilers are extremely reliable, but if you want to keep yours working as effectively and efficiently as possible, it’s essential that you arrange regular services. This is also a requirement for many extended boiler warranties.

If you’re wondering how much you can expect to pay for a gas boiler service, keep reading. Here, we take a look at the cost of this maintenance, what it involves and why it’s so important.

What is a gas boiler service?

So, what does a gas boiler service involve? This type of proactive maintenance is intended to ensure that your appliance remains safe, reliable and efficient. It is carried out by a Gas Safe registered engineer and includes a full examination of all boiler components.

The engineer will remove the boiler casing and conduct a visual inspection to make sure that the appliance still meets the necessary requirements, and they will check for any leaks or corrosion. Among other things, they will check the heat exchanger, main injector, spark probe, burner, electrical connections, seals, controls, water and gas pipework, and flue and combustion releases. They will also make sure your boiler is functioning at the correct pressure.

The expert will replace any worn or damaged parts and clean components as necessary in order to optimise the efficiency and performance of the appliance.

After the service is completed, your engineer may provide you with a service report to explain what they have done. If you have any questions at this stage, don’t be afraid to ask.

How much does a gas boiler service cost?

You can expect to pay anywhere between £60 and £170 for an annual gas boiler service depending on the size of boiler and style of unit, although typically prices range between £65 and £110. A number of factors can impact on how much you pay. For example, a one-off boiler service - as opposed to an annual service - may cost you more as it may involve more work. 

The type of boiler you have, where you live and the company you use will also have an effect on price. You may be able to save money by comparing quotes from a few different engineers or companies, but always make sure you go for a Gas Safe registered professional.

If your boiler needs repairs, you will usually be required to pay extra for them. However, check if your appliance is still under warranty. Under a warranty provided by Viessmann, manufacturing or material defects will either be fixed or replaced, this does not include components that may need replacing due to fair wear and tear.  

Some boiler repairs may be covered under your home insurance policy, so make sure you read the small print to see if you could save yourself money in this way.

Why is a gas boiler service important?

Because they cost money, it can be tempting to put off gas boiler services. However, doing this could actually end up costing you significantly more in the long term. After all, skipping a service could mean that small problems with your boiler that would be easy and cheap to fix if caught early end up getting much worse - ultimately requiring major repairs. 

Failing to arrange regular services can also mean your boiler doesn’t function as efficiently as possible, resulting in higher energy bills. It may also shorten the lifespan of the appliance, meaning you have to buy a new one sooner.

Then there’s your boiler warranty to consider. Your boiler provider will almost certainly stipulate that annual servicing by an approved engineer is required in order for your warranty to remain valid. So, if you don’t arrange these checks, you could lose out on a free repair or replacement of your boiler if something goes wrong within the warranty period.

Not arranging regular boiler checks can also compromise your safety. During a service, your engineer may detect and fix a potential carbon monoxide leak, helping to protect you and your family from this toxic gas.

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How long does a gas boiler service take?

A standard gas boiler service should take around 30 minutes, however this does vary depending on the particular model. Also, if extra work is needed, your heating engineer may take longer.

How often should I get my boiler serviced?

If you’re wondering how often to service a gas boiler, in most cases the answer is once a year. As mentioned previously, most warranties require an annual service - and this is also good practice for keeping your boiler in safe and efficient working order.

However, you don’t have to wait a full year between services. For example, if you think that your boiler may not be working correctly, it’s recommended to contact an engineer even if your regular service is not due for some time.

Even more importantly, make sure you book a service immediately if you notice the signs of carbon monoxide poisoning. Symptoms include headaches, dizziness, tiredness, confusion, nausea and vomiting, stomach pain, and difficulty breathing.

Can I service my own gas boiler?

Don’t attempt to service your boiler yourself. By law, only Gas Safe registered engineers are able to carry out these boiler checks. Attempting to do so yourself could be highly dangerous, and it will not meet the terms of your warranty agreement.

All Gas Safe engineers carry an identification card that confirms their accredited status, so you can request to see this ID. Look for the Gas Safe logo when choosing a company online too.

You may also want to go for an engineer who has been trained on the specific make of boiler you have. This will help to ensure the service is conducted to the highest possible standard, and it will also mean that genuine spare parts are fitted if needed.

Is a gas boiler service the same as a gas safety check?

It is important to understand that a gas boiler service and a gas boiler safety check are two separate things - however they may be done together.

A gas safety check for your boiler consists of all of the checks and tests needed to ensure the appliance is safe to operate - for example, the gas is burning correctly and the boiler is physically stable, securely fitted and properly connected to the gas pipework. The check will also involve making sure there is a suitable, permanent air supply suitable for the appliance type installed, checking any flues or chimneys are operating correctly and ensuring all safety devices function correctly. It does not, however, contribute to maintaining your boiler’s performance and reliability.

In contrast, a gas boiler service will include all of the above checks and tests but also any other specific checks, for inspection and/or cleaning of the appliance as specified and detailed in the appliance manufacturer’s instructions.

If you have a Viessmann boiler and have a question for our customer or technical support teams, visit our support page.

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