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Top 8 Maintenance Tips For Air Source Heat Pumps

Top 8 Maintenance Tips for Air Source Heat Pumps


Air source heat pumps (ASHP) are excellent alternatives to conventional heating systems, allowing homeowners in the UK to heat their homes in a more energy-efficient manner. They work by extracting the warmth from the outdoor air and transferring it to the indoor space, providing a consistent supply of heat all year round. However, to ensure optimal performance, your ASHP must be properly maintained. In this blog post, we’ll share some essential maintenance tips that will help you extend the lifespan of your heat pump and guarantee reliable performance.

How to look after your air source heat pump

1. Keep the outdoor unit clean

The outdoor unit is exposed to all kinds of weather and can quickly become covered in dirt, leaves, and debris. This can reduce the efficiency of your heat pump and cause it to work harder than necessary. Clean it with a soft brush or cloth and ensure that the airflow is not obstructed. Regularly clean the unit with a hose or pressure washer to keep it free of debris.

2. Check the air filters and Inspect fan blades

Dirty air filters can reduce the efficiency of your heat pump and cause it to work harder than necessary. Clean or replace the filters according to the manufacturer’s recommendations, typically every 1 to 3 months. This helps maintain good airflow and indoor air quality.  Over time, fan blades can accumulate dirt and dust, affecting their performance. Regularly inspect the fan blades and clean them if necessary to maintain proper airflow.

3. Keep the indoor unit clean

Your indoor unit also needs to be kept clean to ensure proper operation. Dust and debris can build up on the unit and reduce airflow. Use a vacuum or soft brush to clean the unit regularly.

4. Check the refrigerant level

The refrigerant in your heat pump is vital to its operation. If the level is too low, your heat pump won’t work efficiently. Have a professional check the refrigerant level regularly and add more if needed.

5. Inspect the electrical connections

Loose or damaged electrical connections can cause your heat pump to malfunction or stop working altogether. Check the connections regularly and have any issues repaired by a professional. Periodically inspect the electrical connections, ensuring they are secure and free from corrosion. However, always turn off the power to the heat pump before inspecting or performing any electrical maintenance.

6. Have a professional check the evaporator and condenser coils

The evaporator and condenser coils can become dirty over time, reducing the efficiency of your heat pump. Have a professional clean and inspect the coils regularly to ensure proper operation.

7. Monitor and clean the drainage system

The heat pump has a drainage system to remove condensate. Check the drainage pipes and ensure they are clear from obstructions. Clean and clear any clogs to prevent water backup and potential damage.

8. Schedule regular maintenance with a professional

While there are many things you can do to maintain your heat pump, it’s important to have a professional inspect and maintain it regularly. Scheduling annual maintenance can help prevent breakdowns and keep your heat pump running efficiently.


An air source heat pump is an investment that can provide a comfortable and energy-efficient heating solution for many years. Regular maintenance can keep your heat pump operating at peak efficiency, extend its lifespan and prevent potential breakdowns. Just remember to keep the outdoor unit clean and free from debris, inspect the indoor unit frequently, replace or clean filters, schedule annual maintenance, and keep an eye on your thermostat. Taking these simple steps can help you enjoy your heat pump for many years to come. Also, the government are making air source heat pump grants available to households across the UK. Visit Warma UK website to find out more about how you can benefit from these grants and get your ASHP installed.


Athira Harish

Athira Harish