Air source heat pump maintenance checklist

A high-quality air source heat pump can last many years if properly cared for. Regular maintenance will ensure that your heat pump continues to work to its full potential.  

The guide below is something you can refer to once your heat pump is installed. It will give you the knowledge and confidence to make informed decisions and take any required action. 

How to maintain a new air source heat pump 

All heat pump manufacturers require an annual service for extended warranties; otherwise, a warranty may only cover one or two years. Also, if you have obtained funding via the boiler upgrade scheme grant, it is a condition that the heat pump be serviced annually. The service should be conducted by a qualified person who has received recent training in heat pump technology. 

A heat pump service usually includes a complete visual check, temperature checks, system checks (visual and diagnostic), and a check of all heating pipework for leaks. The service should also include checking the safety valves on the cylinder, cleaning internal components and filters, and an electrical circuit test, along with professional advice on system setup and product use. 

How to maximise your air source heat pumps lifespan 

Most air and ground source heat pump systems are backed by a standard 5-10-year warranty on parts and labour, contingent on annual inspections. However, the true benefit lies in their potential lifespan. With proper maintenance and strict yearly servicing, a heat pump can easily last 15 years or more and, in some cases, even extend beyond 25 years. 

How to help make your air source heat pump last for years 

Remove any obstructions  

One of the best ways to ensure that your heat pump has enough airflow is to keep trees, bushes, and other obstructions at least 5 feet away from it. If any branches are blocking the heat pump, you should trim or remove them to keep them clear and brush away any other nearby debris. 

Monitor your water pressure 

Your air source heat pump is part of a heating system that relies on a certain amount of water pressure to effectively heat your home. With an air source heat pump, your system’s water pressure should be set to a minimum of 1 bar. 

Clean the unit 

Regularly clean your air source heat pump with a soft brush to remove dirt or debris that can build up and block the working parts. Just brush down the outside of the unit with a soft brush and make sure nothing is blocking the airflow. Take extra care not to damage the metal fins at the rear and sides of the unit. 

Check electrical wiring 

Regular inspection of the wiring to your air source heat pump system is important for ensuring safety and preventing potential power problems. Over time, wiring can become damaged or worn due to exposure to the elements. 

Check for wear and tear 

Checking for general wear and tear and getting issues fixed as soon as you spot them will help prolong the life of your heat pump and ensure you are getting the best level of efficiency.  

Please note that if you see anything of concern that you don’t feel confident in dealing with, you should call a professional. 

What to check every couple of weeks 

To ensure your air source heat pump operates efficiently, there are some simple checks you can perform every couple of weeks. 

Inspect the area around the unit  

Ensure that no debris, such as leaves or other obstructions, is blocking the airflow to the unit. While air source heat pumps work perfectly fine in winter, it’s important not to let the unit become submerged in snow. 

Listen for unusual noises 

Pay attention to any unusual sounds coming from the unit. This could indicate a problem with the fan or compressor, and it's best to address it early. 

Check the unit's display  

Most modern heat pumps have a digital display that shows error codes or other valuable information. Check the display regularly for any alerts and consult your manual for troubleshooting steps. 

What to check every couple of months 

In addition to the bi-weekly checks, perform these tasks every couple of months to keep your heat pump in good condition: 

Inspect the fins 

The outdoor unit's fins can become bent or damaged, restricting airflow. Use a fin comb to straighten any bent fins and remove debris. 

Check the condensate drain 

Heat pumps produce condensate, which needs to drain away correctly. Check the condensate drain for any clogs or obstructions and clear them as needed. 

What to check every year 

For more in-depth maintenance, consider these checks every year: 

Professional inspection  

Schedule a professional inspection with a qualified technician. They will be able to check refrigerant levels, electrical connections, and other critical components. 

System performance evaluation  

Have a professional evaluate your system's overall performance. They can identify areas where it is not operating efficiently and recommend solutions. 

Troubleshooting issues with air source heat pumps 

Even with regular maintenance, you may encounter rare issues with your air source heat pump. Should any of the following symptoms arise, here are some troubleshooting tips that you may find helpful to.  

Unit not heating or cooling  

First, check the thermostat settings and make sure the unit is set to the correct mode. If the problem persists, there may be a more significant issue, such as a refrigerant leak, that will require professional attention. 

Unusual noises  

As mentioned earlier, unusual noises can indicate a problem with the fan or compressor. Turn off the unit and inspect the fan blades for any obstructions or damage. If the noise continues, contact a qualified technician. 

Ice buildup 

In wintry weather, ice can build up on the outdoor unit. All heat pumps have a defrost cycle that should remove the ice. However, if ice buildup is excessive or the defrost cycle doesn't seem to be working, consult a professional. 

High energy bills 

If you notice a sudden increase in your energy bills, it could be a sign that your heat pump is not operating efficiently. Clean the unit and schedule a professional inspection to identify any underlying issues. 

Safer heat energy 

Remember that heat pumps have fewer moving parts than most fuel boilers and don’t involve gas combustion, making them safer and more dependable. 

By following this maintenance checklist and addressing any issues promptly, you can ensure that your air source heat pump operates efficiently and reliably for years to come.  

For further information visit out heat pump page, or contact us.