Air source heat pumps are becoming increasingly popular across the UK as homeowners look for more energy efficient and environmentally friendly heating solutions. These systems offer reliable heating, lower carbon emissions, and long term savings when installed correctly.
However, like any heating system, heat pumps can sometimes experience issues that affect their performance and efficiency. Understanding the most common heat pump problems and how to fix them can help homeowners maintain reliable heating and avoid unnecessary costs.
At Infinity, backed by Ovo, we help homeowners across the UK with professional heat pump installation, servicing, and maintenance to ensure systems continue running efficiently throughout the year.
How Does an Air Source Heat Pump Work?
An air source heat pump absorbs heat from the outside air and transfers it into your home to provide heating and hot water. This system moves heat from one place to another using electricity instead of generating heat by burning fuel.
Because of this process, heat pumps are highly efficient and can produce several units of heat from a single unit of electricity. Proper installation, regular servicing, and correct system settings are important To maintain this efficiency.
1. Heat Pump Not Heating Properly
Sometimes a heat pump may not heat the home properly. This can happen because of wrong thermostat settings, dirty filters, low refrigerant levels, poor home insulation or an incorrectly sized system.
In order to resolve this issue, first, check if the thermostat is set to heating mode correctly. Clean or replace the filters regularly to improve airflow. If the problem continues, a professional engineer may need to inspect the system. Improving home insulation can also help keep the heat inside and improve performance.
2. High Electricity Bills
Some homeowners notice higher electricity bills even after installing a heat pump. This can happen if the home has poor insulation, the temperature is set too high or the heating system is not designed properly. Heat pumps work best in well insulated homes.
Adding loft insulation, wall insulation or double glazing can improve efficiency. Lowering the thermostat slightly and avoiding constant temperature changes may also help reduce energy costs.
3. Heat Pump Freezing in Winter
Frost may build up on the outdoor unit during the colder months.. A small amount of frost is normal but too much ice can affect the performance of your heat pump. This may happen because of blocked airflow or dirt around the unit.
You can keep the outdoor unit clean and free from leaves, snow, and debris. Most heat pumps have an automatic defrost function but if the ice does not clear, a professional inspection may be needed.
4. Strange Noises from the Heat Pump
Heat pumps are usually quiet so unusual noises may mean something is wrong. Loose parts, fan problems, trapped debris or refrigerant issues can all cause noise.
You need to check if anything is blocking the outdoor unit or fan. If the noise continues, contact a qualified engineer to inspect the system before the issue becomes worse. .
5. Heat Pump Constantly Turning On and Off
If your heat pump frequently turns on and off, it can reduce efficiency and put extra strain on the system. This can happen because of thermostat problems, blocked airflow, electrical issues or an oversized system.
Make sure the thermostat is not placed near direct sunlight or heat sources. Cleaning filters and checking airflow may also help. If the problem continues, professional support may be required.
6. Low Hot Water Supply
Some homeowners may notice less hot water after installing a heat pump. This may be caused by incorrect settings, high hot water usage or system setup issues.
Check the hot water temperature settings and make sure the cylinder is working properly. In homes with high hot water demand, a larger cylinder or system adjustment may be needed.
7. Poor Installation Problems
Many heat pump problems are caused by poor installation rather than faults with the system itself. Incorrect sizing, poor pipework or unsuitable radiators can affect efficiency and comfort.
Selecting experienced and qualified installers is very important. At Infinity (now integrated with Ovo), our engineers carefully assess each property to ensure the system is installed correctly for the best performance.
The Importance of Regular Maintenance
Like any heating system, heat pumps operate best when they receive regular maintenance. Servicing helps identify smaller issues before they develop into more expensive problems.
Routine maintenance can improve energy efficiency, extend system lifespan, reduce repair costs, maintain reliable heating performance, and protect manufacturer warranties of your heat pump. In most cases, annual servicing is enough to keep the system operating efficiently throughout the year.
Tips to Keep Your Heat Pump Running Efficiently
Homeowners can take several simple steps to improve heat pump performance and reduce the likelihood of problems:
- Keep filters clean
- Maintain clear airflow around the outdoor unit
- Avoid sudden thermostat changes
- Schedule annual servicing
- Improve home insulation
These small steps can help maximise efficiency and long term savings.
When Should You Call a Professional?
Some minor issues can be resolved with simple checks and maintenance. However, homeowners should contact a qualified engineer if they notice:
- Persistent heating problems
- Unusual noises
- Ice buildup that does not clear
- Electrical issues
- Refrigerant leaks
- Sudden increases in energy usage
Professional servicing helps ensure the system remains safe, efficient, and reliable.
Conclusion
Air source heat pumps are an efficient and environmentally friendly heating solution for UK homes but like any system, they can occasionally develop problems. Most common issues can be prevented or resolved through proper installation, regular maintenance, and good system management.
Understanding how heat pumps work and recognising early warning signs can help homeowners avoid larger repairs and maintain long term performance.
At Infinity, backed by Ovo, we provide professional heat pump installation, servicing, and maintenance across the UK. Our experienced team helps homeowners keep their systems running efficiently for reliable comfort and long term savings.
Contact Infinity (now integrated with Ovo) today for expert advice, heat pump servicing or a free consultation for your property.