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Biasi Boiler Service & Maintenance

Rob Wells
By: Rob Wells
Updated: 9th December 2021

A good quality boiler should last for around 10-15 years on average and Biasi boilers are no exception.

However, to perform at its best for as long as possible you need to look after it and that includes having it serviced every year by a Gas Safe engineer. On a Biasi boiler a single spanner symbol will appear when your boiler is due for a service.

Is your boiler due a service?



What is a boiler service?

A boiler service is a health check for your boiler to ensure it's working efficiently and effectively. It also rules out any potential safety risks and identifies components which are close to needing replacing. Boiler services should only ever be carried out by a Gas Safe registered engineer (or an OFTEC registered engineer if you have an oil boiler).

A Gas Safe engineer is someone listed on the UK's official register of engineers legally allowed to work on gas appliances. You can check if an engineer is registered by visiting the Gas Safe Register website and you should always ask to see their Gas Safe ID card when they arrive to service your boiler.

Why is it Important to Service Your Biasi Boiler?

A boiler is very much like a car; in order to perform at its best the mechanics and electrical elements need to be well maintained. Without a regular service you risk damaging your boiler and shortening its lifespan.

Vital safety checks

One of the most important reasons for getting your boiler serviced every year is the safety checks that the engineer will carry out. A boiler which is working incorrectly, e.g. not burning fuel completely can be a potential safety risk as it can cause a carbon monoxide leak. Carbon monoxide is an odourless and colourless gas carbon monoxide poisoning is a very serious issue; when breathed in it can cause severe illness, brain damage and even death.

If you have even a slight concern that carbon monoxide might be coming from your Biasi boiler then you should contact an engineer straight away, don't wait until your next service is due.

Save money on heating bills

A well maintained boiler is more energy efficient which means it will use less fuel to heat your home. A boiler that uses less fuel means you have lower energy bills and your home produces less carbon emissions into the environment. As part of the boiler service your engineer will check that everything is running as efficiently as possible.

Identify problems

Even a small performance issue could become a complete breakdown if left for too long. Arranging an annual boiler service gives a professional engineer the opportunity to check the system for early signs of wear and tear before you're facing a hefty repair bill.

Keep your manufacturer's warranty

Biasi boiler warranties range from 5-7 years depending on which model you choose but to keep the warranty valid the boiler needs to be serviced on an annual basis by a Gas Safe engineer. Without a warranty you'll be responsible for the costs of any repairs or breakdowns which can be pricey, so an annual service is well worth the peace of mind.

Is your boiler due a service?



Boiler service checklist

During a standard boiler service the engineer will carry out several checks and tests to make sure your boiler is working efficiently and safely. A service should last for at least 30 minutes if done properly but it could take longer if the boiler is older or the engineer needs to carry out repairs. Here's a brief summary of what's involved:

  1. The engineer will check the boiler over visually to ensure it doesn't have any corrosion or leaks and that the flame is burning blue as this means it is burning fuel correctly.
  2. They will then remove the boiler casing to check and clean the internal components such as the heat exchanger, burner, main injector, safety devices and spark probe.
  3. The engineer will check that the flue terminals aren't obstructed and are fitted safely and that any seals, water and gas pipework are intact.
  4. They will check the water flow and gas pressure levels to ensure they're correct.
  5. The boiler will be started up again so the engineer can look for any operational faults with the boiler or temperature controls.

The engineer will give you a service report detailing what they've done.

How much does a Biasi boiler service cost?

On average a boiler service will cost £60 – £120 but this can vary depending on which engineer you choose. The best way to get the best price is to find quotes from a few different engineers so you can compare.

The price of a boiler service can also be impacted by the make of boiler, its age and where you are located in the UK. A boiler service in London is likely to be more expensive than somewhere in the north, for example. The price will also increase if the engineer finds any faults which need repairing or parts which need replacing.

You may be able to save money on the cost of a boiler service by getting it taken care of in the summer rather than the winter. This also means you can get any small problems taken care of before the really cold weather hits and you're relying on your boiler for heating and hot water.

NEVER try to carry out a boiler service yourself – always find a Gas Safe registered boiler engineer.

Is your boiler due a service?



Boiler service plans

It is possible to avoid the upfront cost of a service each year by taking out a boiler service plan or boiler insurance which includes a servicing contract. These plans enable you to pay monthly over a year which can be more affordable for some people.

However, it's worth noting that these payments will usually end up costing you more than if you pay in one lump sum, so it may make more sense to simply put some money aside each month and save up for it.

On a side note, boiler insurance is only really useful for boilers which are no longer covered by the manufacturer's warranty. In these cases they can give great peace of mind that you won't be faced with a big repair bill out of the blue, especially if the boiler is 8 years old or more.

Boiler maintenance

As well as the service, you can carry out some checks yourself to make sure your Biasi boiler is running as it should all year round.

Insulate your pipes

Your external pipes can freeze in winter which can cause blockages, pressure that is too high, leaks and could potentially end up in a full breakdown. You can help to prevent this by insulating the pipes with lagging.

Monitor the pressure

The best pressure level for a boiler should be between 1 and 1.5 bar. As a boiler works this pressure will naturally decrease over time so you should keep an eye on the pressure gauge to ensure it doesn't fall too low. If it's too low the boiler might struggle to ignite but pressure that is too high can damage the system. Should your boiler need repressurising, then you should check the instruction manual provided by your manufacturer or contact an engineer if you're unsure.


You can have a brand new Biasi boiler on the wall but if your home isn't well insulated then you won't feel the full benefit of the energy savings as it will have to work extra hard to warm you up. If heat is escaping through window seals, letterboxes, chimneys or other draughts it's worth considering sealing them up during the cold months.

Book an annual service

DIY boiler maintenance is essential but will only get you so far; it should be done in addition to an annual boiler service, not instead of one.

Need a Biasi boiler service?

Get free quotes from Gas Safe registered engineers in your area for your next boiler service by completing our simple online form.

Head back to the main Biasi page.

Rob Wells

About the author

Rob Wells

Rob is another of our resident home heating experts. He manages our external partnerships, making sure you get the most up to date information.

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