An air source heat pump is a fantastic eco-friendly heating solution that draws heat from the air to warm your home. As more people in the UK look for ways to sustainably reduce their energy costs and carbon footprints, heat pumps are growing in popularity. 

However, many homeowners don’t realise that – like any other heating system – heat pumps benefit from regular maintenance. This helps them run efficiently, last longer, and keep your energy bills as low as possible. 

In this guide, Adlår’s experts will explain the simple air source heat pump maintenance steps that will keep your system performing at its best all year round.

Why Regular Maintenance is Essential for Your Air Source Heat Pump

Benefits of Routine Maintenance

Regular maintenance is essential for your air source heat pump to continue operating efficiently and reliably in the long term. 

Over time, dirt and debris can accumulate in the heat pump system, reducing airflow and heat exchanger efficiency, which increases energy consumption and operating costs. 

Taking a proactive approach to air source heat pump maintenance offers:

• Increased Efficiency – A well-maintained heat pump uses energy more effectively, which in turn saves you more money on your energy bills.
• Reduced Environmental Impact – Maintaining efficiency means using less energy, which is better for the environment – a key benefit for those committed to sustainable living.
• Extended System Lifespan – Regular care helps prevent wear and tear, meaning your heat pump will last longer, require fewer repairs, and be less likely to break down unexpectedly. In fact, with proper maintenance, modern air source heat pump units can last up to 25 years.
• Lower Long-Term Costs – As well as reducing your energy costs, routine heat pump upkeep saves you money by allowing any issues (such as refrigerant leaks, worn-out components, or electrical problems) to be detected early and fixed before they turn into more costly repairs.
• Consistent Heating and Cooling – Keeping your heat pump unit in peak condition helps ensure its consistent performance, maximising your comfort throughout the year.

Monthly Air Source Heat Pump Maintenance Tasks You Can Do Yourself

While some air source heat pump maintenance is best left to professionals, there are several tasks you can perform yourself to keep your heat pump in good shape. Here’s what our experts suggest you do each month.

1. Cleaning or Replacing the Filters

Why It’s Important: Filters help keep pollen, dust, dirt, and other airborne debris out of your heat pump system. When they’re clogged, it forces the heat pump to work harder, which decreases efficiency and could lead to overheating.

How to Do It: Locate the air filter in your system (it is usually in the indoor unit). Most filters should be checked monthly, especially during peak seasons, and cleaned or replaced every 1 to 3 months. Whether you should clean or replace the filter depends on the type used by your specific air source heat pump model; for washable or reusable filters, cleaning is appropriate and cost-effective, but disposable filters must be replaced when dirty. Visit this step-by-step guide to learn more.

2. Checking for Obstructions Around the Outdoor Unit

Why It’s Important: The outdoor unit needs clear airflow to operate efficiently. Debris, plants, or other obstructions can restrict airflow, reducing efficiency and potentially damaging the system.

How to Do It: Clear away any leaves, dirt, snow, or other debris around the outdoor unit. Aim to keep a 2 – 3 foot clearance on all sides, especially during autumn and winter when leaves and snow can pile up quickly.

3. Inspecting for Leaks or Ice Build-up

Why It’s Important: Issues like ice build-up or refrigerant leaks can affect system efficiency and reliability.

How to Do It: Check the outdoor unit for any signs of leaks or ice, especially during colder months. If you see ice build-up, try defrosting it, attempt to remove it gently, or contact a professional to inspect the system. If you suspect a refrigerant leak, call your technician straight away, without touching or attempting to repair it yourself.

Seasonal Maintenance Tasks to Keep Your System Efficient

Certain air source heat pump maintenance tasks are best done seasonally. Here’s what you should plan for every few months.

1. Cleaning the Coils

Why It’s Important: Air source heat pumps typically contain two heat exchanger coils – one in the outdoor unit, and at least one in the indoor unit. Dirty coils make it harder for the heat pump to transfer heat, which reduces efficiency and forces the system to work harder.

How to Do It: Carefully clean the coils at least twice a year – ideally after spring and autumn, when pollen and debris are more likely to build up. Consult your heat pump’s manual for instructions, or ask a professional to clean them during an annual inspection.

2. Checking Refrigerant Levels

Why It’s Important: Refrigerant is essential for your heat pump to operate efficiently. Low refrigerant levels can reduce heating performance and damage the compressor over time.

What to Do: Since refrigerants require professional handling by law, it’s best to have a qualified technician check your system’s levels every six months. If refrigerant levels are low, they can top it up safely and confirm that no leaks are present.

3. Adjusting System Settings with the Season

Why It’s Important: By adjusting settings seasonally, you can maximise comfort while ensuring your system uses the optimal amount of energy for the current weather.

How to Do It: In winter, consider setting a consistent heating temperature, while in summer, raise the temperature slightly for cooling. Smart heat pumps like Adlår’s dual heat pump system may have built-in seasonal adjustments, which you can activate through the system’s app or control panel.

Annual Maintenance Tasks Best Done by Professionals

For air source heat pump maintenance tasks that may be more complex, it is best to book an annual service with a professional who can keep your system in peak condition.

1. Annual System Inspection and Servicing

Importance: During an annual check-up, a technician can identify any minor issues before they escalate, saving you from more costly repairs.

What’s Included: A professional will inspect electrical connections, refrigerant levels, and thermostat settings. They may also clean or replace parts if needed and make sure the system is operating at peak efficiency.

2. Cleaning and Servicing Fan Blades and Motors

Importance: Clean, well-maintained fan blades and motors help the heat pump run smoothly and efficiently, minimising wear and tear.

What to Expect: A professional will clean and lubricate moving parts as part of an annual service. This helps reduce noise and allows your system to continue functioning reliably.

Tips for Finding Reliable Air Source Heat Pump Maintenance Services

When choosing a maintenance provider, look for technicians who: 

• Specialise in air source heat pumps.
• Operate in your local area.
• Can respond quickly to service requests.
• Have the necessary certifications and experience working with heat pumps.
• Have a track record of quality service and reliability.

Frequently Asked Questions About Air Source Heat Pump Maintenance

Q: How often should I clean the filters?

A: Filters should be checked monthly and cleaned or replaced every 1 – 3 months, depending on the type used in your model.

Q: What happens if I skip air source heat pump maintenance?

A: Skipping maintenance can lead to reduced efficiency, higher energy bills, and an increased risk of breakdowns.

Q: When should I schedule air source heat pump maintenance?

A: Maintenance can be scheduled at any point in the year, but we suggest booking it during off-peak times, like spring or autumn, when demand for heating and cooling services is generally lower.

Q: How much does professional servicing typically cost?

A: Annual servicing for a heat pump generally costs between £100 – £150, depending on your location and service provider.

Q: Can I perform air source heat pump maintenance myself, or do I need a professional?

A: While you can handle simple tasks like cleaning filters and clearing debris, it’s best to have a professional handle more complex air source heat pump maintenance like annual inspections and repairs.

Keep Your Air Source Heat Pump Running Efficiently All Year With Help From Adlår

Regular maintenance is the key to a reliable, efficient, and cost-effective air source heat pump. From simple monthly tasks to professional annual check-ups, each step helps extend the lifespan of your system, keeping it efficient and eco-friendly.

For professional help or to schedule an annual air source heat pump maintenance service, contact Adlår Castra UK for expert support.