It's time for an update

You've been using your good friend IE for quite some time now. It has been a reliable companion for probably the last 20 years.

Unfortunately, due to technology constantly evolving, we would like to kindly ask you to update your browser to one of your liking from the ones listed below. This will ensure that you're going to have good time on our site. Actually, any site really.

Farewell, Internet Explorer.

What to expect from a heat pump service

Although heat pumps are a low-maintenance heating option, it is still important to have them serviced regularly to make sure they are performing safely and efficiently.
air source heat pump outside a large brick home

Heat pumps work by extracting environmental energy (air, water or heat from the ground) which is then converted using a refrigerant inside the heat pump to generate heating and hot water for your home.

They are a more efficient method of heating your home compared to gas boilers but similarly to boilers, heat pumps still require a service. All checks on a heat pump should be carried out by a qualified MCS heating engineer.

In this guide we are going to explain the importance of having your heat pump serviced and what a service includes.

Watch our video 'What to expect during a heat pump service'

a mum and daughter playing in the garden

Why should I get my heat pump serviced?

Regardless if you have an air, ground or water source heat pump, having it serviced can help the longevity of the heat pump. On average, a heat pump can work for at least 15 years. However, a well maintained heat pump could operate efficiently for up to 20-25+ years.

During the service, the engineer will check the efficiency and performance of your heat pump to ensure the system is working correctly and delivering the desired comfort levels to your home.

A heat pump service will ensure the validity of your warranty. All Vaillant heat pumps come with a standard guarantee of two years (with an option to extend up to seven years through your Vaillant Advance installer).

How often should I have my heat pump serviced?

Whilst heat pumps have a robust design with very few moving parts, you should still have them serviced once a year after the initial heat pump installation. The service must be carried out by an MCS heating engineer. You can find a heat pump installer here.

We recommend having your heat pump serviced in the warmer months so when the temperatures drop in the winter, you will then be confident that your heat pump is operating at maximum efficiency.

What does a heat pump service include?

A heat pump service covers a range of tests, checks and inspections to assess the safety and efficiency of the heat pump. It is important that this is only carried out by a qualified MCS heating engineer.

The service includes:

  • Full visual checks

  • Temperature checks

  • System checks (visual and diagnostic)

  • All relevant pipework pressure tested (including leaks)

  • Electrical circuits tested

  • Professional advice on system set up and product use

Vaillant aroTHERM plus heat pump outside home

Air source heat pump servicing

Air source heat pumps are the most common system in the UK as they are easy to install compared to their counterparts. They extract thermal energy from the air and convert this into heating and hot water for your home.

Air source heat pumps are designed to work in cold temperatures and are suitable for a range of homes, from a small apartment to a large detached home

As they are an external unit, they are more likely to be subject to harsh weather conditions meaning it is very important they are serviced. The engineer will check the evaporator is free from debris to ensure maximum airflow and also inspect the fan blade to ensure this is free from obstruction.

ground source heat pump unit inside home with stairs and paintine

Ground source heat pump servicing

Ground source heat pumps work by extracting renewable energy from the ground and are perfect for homes that have land to install a ground array or borehole system. As the temperature of the ground rarely alters throughout the year, they are very efficient.

Although they are underground, they still require an internal unit which contains the key components. Therefore an annual service is required to make sure the system is still working efficiently.

Water source heat pump servicing

Water source heat pumps offer an efficient energy solution for properties that are close to a body of water. They work by extracting heat from the water and turning it into energy that can be used to heat your home and supply with hot water.

If you have an open loop system, they require a regular service to ensure water is clean and can sufficiently draw and filter water to and from the main water source. The engineer will inspect to make sure everything is working properly.

How much does a heat pump service cost?

The cost of heat pump service can vary depending on what system you have. A Vaillant heat pump service starts from £250 including VAT. This includes all the labour changers but additional charges may apply if replacement parts are required. To book a heat pump service contact your local renewables partner.

If your system is under warranty, then it is important to make sure the annual servicing and maintenance is carried out in order to maintain the warranty.

Watch our video 'Heat pump considerations and expected costs' here.

What other maintenance does a heat pump need?

If you have an air source heat pump, make sure you keep the external unit clear from any garden debris. You can protect the unit further by adding a cover, such as a canopy or free standing cover.

All Vaillant heat pumps have been tried and tested in adverse weather conditions including minus temperatures. Our aroTHERM plus air source heat pump has a de-icing cycle so that when the temperature drops below a certain level, the heat pump will go into the de-icing mode, heating up and clearing the ice from the back of the unit. When this takes place, you will see steam coming from the unit, and water coming from the bottom of the heat pump.

Learn more about looking after your heat pump in the winter here.