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What Does A Boiler Service Include?

what does a boiler service include

A common question that we often get asked is what exactly does a boiler service include? Usually every day we carry out boiler services throughout Cardiff and it’s a service that we highly recommend to keep your boiler running efficiently.

To give you an idea of what a boiler service includes, we’ve written a guide that displays the steps involved to service a “typical” boiler.

The Step Involved To Service A Boiler

1. Exterior Inspection

To begin servicing your boiler, the exterior must be inspected. This involves checking for any signs of damage (such as cracks or corrosion) and ensuring that the boiler is properly sealed and insulated. During the inspection, the flue pipe will be inspected to check that it’s secure and in good condition and that the boiler is also ventilated.

2. Cleaning The Heat Exchanger

The heat exchanger is one of the most important parts of a boiler and it’s responsible for heating the water that’s circulated through the heating system.

Therefore, during a service, it’ll be cleaned to remove any build-up of dirt or debris that could reduce the efficiency of the unit. This is achieved using special brushes and cleaning solutions that are designed specifically for cleaning the heat exchanger.

3. Burner Inspection

To heat up the water in the boiler, the burners are used to ignite the gas. Therefore, a large part of the service is to inspect the burners to ensure they are working properly and there are no signs of damage, corrosion or blockages. Along with the inspection, they’ll also check the combustion process to ensure that it’s efficient and that there is no waste.

4. Inspection of Controls & Safety Devices

The controls and safety devices on your boiler are critical to ensuring that it operates safely and effectively. During a boiler service, these controls and safety devices will be inspected to ensure they are working properly and that there are no signs of damage. This includes checking the pressure relief valve, temperature control and the low water cut-off switch.

5. Boiler Operation Testing

Finally, the operation of the boiler is tested to ensure that it’s running safely, efficiently and effectively. This typically involves turning the boiler on and monitoring its performance as well as checking the temperature and pressure readings to make sure that they are within the manufacturer’s recommended limits. Whilst the boiler is running, a check for any leaks and a visual inspection of the boiler will also take place.

How Often Should You Have You Boiler Serviced?

Regular servicing of your boiler helps to ensure that your heating system is running efficiently and safely. It also futureproofs your boiler in order to prevent costly breakdowns and repairs.

In terms of how often you should have your boiler serviced, it’s recommended that you have a professional plumber service it annually. However, some manufacturer’s may require more frequent servicing in order to retain the validity of the warranty.


To conclude, a boiler service is an important part of maintaining your heating system and it should be performed on a regular basis to ensure that it’s working safely and efficiently.

If you require further information with regards to how we service boilers, feel free to get in touch and we will run you through the exact process in person.

© N.J Harkus Plumbing and Heating Ltd
180 Ffordd James McGhan, Cardiff, CF11 7JU
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