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How Long Do Air Source Heat Pumps Last?

More homeowners in the UK are turning to air source heat pumps as an alternative to traditional heating systems. With the high upfront costs, it's natural to wonder about their long-term value.

What is the lifetime of an air source heat pump?

The lifespan of an ASHP can vary depending on several factors. On average, these systems have last for around 15 years. However, with proper maintenance and repairs, some ASHPs can last even longer, such as 25 years.

This is all influenced by the quality of the pump itself and it’s condition. Higher-quality models are often more durable and have longer lifespans compared to low-end, cheaper alternatives.

Learn more about air source heat pumps

When should I replace my heat pump?

As with any equipment, there comes a point when an ASHP stops working and needs to be replaced. Recognising these signs early on can save you money in the long run.

Here are some signs that it's time to replace your air source heat pump:

  1. Age: If your heat pump is over 15 to 20 years old, it could be near the end of its lifespan and start to have problems.
  2. Increased energy bills: A sudden increase in your energy costs could be a sign that your unit is not working properly. If there are no other reasons behind this, you may need a new system.
  3. Refrigerant leakages: If you notice leaks in your heat pump, it can be a sign of a major problem. When refrigerant levels are low, the heat pump is unable to transfer heat effectively. Repairing the leak may not be cost-effective, and replacing the heat pump might be a better option.
  4. Compressor failure: The compressor is one of the most important parts of a system. Even with regular servicing, it can fail due to various factors, such as wear and tear or electrical malfunctions.
  5. Reduced performance: If your air heat pump is no longer able to heat or cool your home as it once did, it may be time to replace it. Inconsistent temperatures or poor airflow can show the system is failing. This can also lead to higher running costs.
  6. Frequent repairs: If you constantly need to repair your heat pump, it may be cheaper to replace it with a new one. Constant repairs can signal that the system is on its last legs.
  7. Outdated technology: As technology advances, older heat pump models may become outdated and less efficient. Your heat pump may be outdated and unable to keep up with your heating and cooling needs. In this case, it could be time to upgrade to a newer model.

Sometimes it may simply be the case of replacing a part rather than replacing the entire system. For example, your pumps’ air filter can become logged with dirt and dust, which can significantly impact its performance. As a result, the pump works harder than necessary to achieve the desired results. This helps speed up wear and tear on the machine.

It may also depend on the type of heat pump system you have. Whether that is an air source heat pump, ground source heat pump, water source heat pump or solar assisted heat pump.

What factors can impact my heat pumps lifespan?

There are several factors that can impact the lifespan of an air source heat pump.


Proper installation is crucial for the longevity of a heat pump. Installing the system incorrectly can lead to issues with airflow, refrigerant leaks, or electrical problems.


Regular maintenance and servicing are essential for extending the lifespan of an air source heat pump. This includes tasks such as cleaning and replacing filters, inspecting and lubricating components, and checking refrigerant levels. Neglecting regular maintenance can result in decreased efficiency and premature wear and tear.


Extreme weather conditions, such as harsh winters, can put additional strain on the system, causing it to wear and tear. The difference between the outside and inside temperatures means the heat pump needs to use more energy.

Not only does this reduce the efficiency of the unit, but also puts greater stress on parts. This increased workload can lead to more frequent maintenance and replacements of parts, resulting in higher costs for homeowners.


The frequency and intensity of use can also impact the lifespan of an air source heat pump . Heat pumps that are used frequently and for longer durations may experience more wear and tear, leading to a shorter lifespan. On the other hand, heat pumps that are used sporadically or for shorter periods may last longer.

Turning it on and off in response to minor temperature changes or short absences from home, may also reduce its lifespan. The start-up and shutting down processes can cause wear on certain components.


Models from reputable manufacturers tend to be more durable and have longer lifespans compared to cheaper alternatives. Parts used in higher-quality heat pumps are often more reliable, able to withstand regular use demands.

We supply air source heat pumps from a range of reputable patterns including:

How can I increase my pumps lifespan?

To increase the lifespan of your heat pump and ensure its optimal performance, there are several steps you can take:

  • Regular maintenance: Schedule regular maintenance with a professional HVAC technician to inspect and service your heat pump. This includes cleaning or replacing air filters, checking refrigerant levels, lubricating moving parts, and inspecting electrical connections.
  • Proper installation: Ensure that your heat pump is installed correctly by hiring a professional HVAC technician. Improper installation can lead to issues such as poor airflow, refrigerant leaks, or electrical problems.
  • Protect from extreme weather: Take measures to protect your pump from extreme weather conditions, such as cold weather. This can include installing a cover or shelter to shield the outdoor unit from rain, strong winds, or heavy snowfall.
  • Avoid frequent cycling: Minimize unnecessary turning on and off of your heat pump by avoiding frequent cycling. Instead of constantly adjusting the temperature in response to minor fluctuations, try to maintain a consistent temperature setting.
  • Keep the unit clear: Remove any debris or obstructions to ensure proper airflow. This can help prevent overheating and improve efficiency.
  • Extended warranty options: When purchasing a heat pump, consider investing in an extended warranty. This can help provide support for any repairs or replacements needed.

If you have any other questions about air source heat pumps, check out our FAQs.