How do you maintain a heat pump?

Proper maintenance ensures maximum efficiency and a longer lifespan for your heat pump. Both the user and the installer have an important role to play: the user performs basic checks, while the installer schedules regular inspections. In this article, we’ll explain how to maintain your heat pump correctly to keep it running at its best.

Maintaining a hybrid heat pump

A heat pump requires careful maintenance—both annual servicing by a certified professional and routine checks by the user. This keeps performance high and extends the system’s lifespan. Key points to remember:

1. Schedule annual maintenance: A certified installer inspects all technical components, cleans where necessary, and prevents malfunctions or loss of efficiency.
2. Check water pressure regularly: Low pressure reduces efficiency. Monitor the pressure on the display and refill according to the manual if needed.
3. Keep an eye on energy use: A sudden rise in electricity consumption may signal a defect. Track usage via your energy meter or app.
4. Ensure free airflow around the outdoor unit: Remove leaves, dirt, ice, or snow. Good air circulation prevents overheating and boosts efficiency.
5. Follow up on error codes and alerts: Regularly check the display or app. Refer to the manual for troubleshooting or contact a specialist when codes appear.

Differences in maintenance by heat pump type

Maintenance requirements vary depending on the type of heat pump. Each system has specific components that need extra attention:

Hybrid heat pumps (paired with a boiler): require frequent water pressure checks and proper coordination between the two systems. Poor synchronization can reduce performance or cause malfunctions.

Full electric heat pumps: need regular inspection and cleaning of the heat exchanger, filters, and buffer tank—critical parts for stable and efficient heat output.

Air-to-air heat pumps: require frequent filter cleaning, since they draw air directly from the environment. Dust build-up can lower efficiency and reduce air quality.

Air-to-water or ground-source heat pumps: demand special attention for the circulation pump and closed loop system. Regular leak checks and correct antifreeze levels are essential to prevent freezing or pipe damage.

Why heat pump maintenance is important

Maintenance matters not only for short-term operation but also for long-term performance. Reasons include:

1. Efficiency retention: Dirt and wear over time can reduce output. Regular maintenance prevents this and ensures continued efficiency.
2. Warranty conditions: Many manufacturers require proof of regular maintenance to keep warranties valid. Without documentation, you may lose coverage.
3. System coordination: For hybrid setups, the interaction between boiler and heat pump is critical. A fault in one can affect the other. Inspections prevent cross-system disruptions.
4. Lower energy bills: A well-maintained heat pump consumes less electricity, saving you money each month.

What happens during a maintenance check?

During a scheduled service, the technician typically examines:

• Visual inspection of pipes, ventilation, and outdoor unit
• Leak detection and refrigerant circuit cleanliness
• Performance and temperature difference measurements
• Cleaning of filters, heat exchangers, and fans if necessary
• Check of electrical connections and settings for optimal operation

How often does a heat pump need servicing?

Servicing is usually annual or every two years. Hybrid systems typically require yearly checks, depending on usage. For example, larger households may need more frequent servicing than smaller ones.

Outdoor units can clog with debris and should be inspected more often.
Ground-source systems generally require less frequent servicing, since they lack an outdoor unit.
Always check your manufacturer’s manual for system-specific recommendations.

Checking water pressure and energy use yourself

Here’s what you can safely monitor on your own:

1. Water pressure: Should remain between 1.5 and 2 bar. Low pressure can cause faults.
2. Energy consumption: Unexpectedly high usage may indicate an issue.
3. Filters: Some filters are easy to clean or replace yourself.

What does heat pump maintenance cost?

Professional servicing costs between €100 and €200 per year. Extra repairs outside regular maintenance can range from small fixes to several hundred euros, depending on the problem. Regular upkeep saves money in the long run by preventing costly replacements, such as compressors or fans.

Common mistakes in maintenance

When maintenance is neglected, issues can arise such as:

• Filters not cleaned on time, causing blockages in the outdoor unit
• Incorrect refilling of water pressure while the boiler is still running
• Outdoor unit left covered in snow or leaves, risking damage
• Ignoring or resetting error codes without solving the underlying issue

Tip: Keep a log of unusual noises or energy spikes and report them to your installer.

Maintenance contracts: worth it or not?

A maintenance contract is highly recommended. It usually includes annual inspections and preventive servicing, reducing the risk of breakdowns or costly damage. Other benefits:
Priority service in case of malfunctions
Lower costs for spare parts and repairs
Compliance with warranty and subsidy requirements

Interested in scheduled servicing? Contact us to arrange a follow-up appointment.

Frequently Asked Questions (FAQ)

Conclusion

A few simple maintenance habits keep your heat pump in peak condition, ensuring efficient and reliable performance:

• Check water pressure and energy use regularly
• Keep the outdoor unit clean and unobstructed
• Have a professional service the system yearly
• Act promptly on error messages or unusual behavior
• Preventive care is always cheaper—and more sustainable—than repairs.