What Maintenance Do Heat Pumps Need Each Year

Regular servicing plays a key role in keeping a heat pump efficient, reliable, and cost-effective throughout the year, and while heat pumps are known for lower maintenance compared to traditional heating systems, they still rely on clean components, correct settings, and routine checks to perform at their best. Annual maintenance helps protect performance, reduce running costs, and ensure consistent comfort, while also allowing small issues to be identified early before they develop into larger problems.

What Happens During an Annual Heat Pump Service?

Full system inspection and condition assessment

The engineer will begin with a detailed visual inspection of the entire system. This includes the outdoor unit, indoor components, pipework, valves, and insulation. Any signs of corrosion, vibration damage, or weather-related wear are noted and addressed where possible.

The mounting and positioning of the outdoor unit are also checked to ensure it remains stable and unobstructed. Even small airflow restrictions or movement can reduce efficiency and increase noise over time.

Performance testing and efficiency review

Performance testing is a core part of annual maintenance. Flow temperatures, return temperatures, and system pressures are measured to confirm the heat pump is operating efficiently. These readings help highlight circulation issues, incorrect settings, or early signs of component strain.

The engineer may also review system run times and energy usage trends. If adjustments can be made to improve efficiency without affecting comfort, these will be applied during the service.

Cleaning and airflow maintenance

Clean airflow is essential for efficient heat transfer. Filters are inspected and cleaned or replaced where necessary, while the outdoor coil and surrounding area are cleared of dirt, leaves, and debris.

Restricted airflow forces the system to work harder, increasing electricity consumption and wear on components. Regular cleaning supports quieter operation and steadier performance throughout the year.

Refrigerant checks and environmental safety

The refrigerant circuit is checked to ensure there are no leaks and that pressure levels are correct. Even minor refrigerant issues can reduce heating output and efficiency if left unaddressed.

These checks also ensure the system operates safely and in line with environmental regulations, helping maintain reliable performance during colder months.

Electrical, control, and safety system checks

Electrical connections are inspected for signs of overheating, looseness, or wear. Control boards, sensors, and thermostats are tested to ensure accurate communication and responsive system control.

Safety devices such as pressure relief valves and temperature sensors are also checked to confirm correct operation, helping protect both the system and the property.

Hot water cylinder and heat distribution assessment

For homes using a heat pump for hot water, the cylinder and associated components are reviewed carefully. Expansion vessels, valves, immersion heaters, and temperature controls are checked for correct operation.

The engineer will also assess how heat is distributed through radiators or underfloor heating, ensuring even warmth, correct flow rates, and balanced performance across the home.

System optimisation and setting adjustments

Annual servicing often includes fine-tuning system settings to suit seasonal conditions and household usage. Adjustments may be made to flow temperatures, schedules, or controls to improve comfort while keeping energy use under control. These small changes can make a noticeable difference to how efficiently the system runs over the following year.

Book professional heat pump servicing in Epsom, Sutton, Carshalton and Surrey

RCB Plumbing Heating Renewables provides professional heat pump maintenance and annual servicing. Regular servicing helps protect efficiency, comfort, and long-term system reliability. Call 02082617499 or fill out the contact form to book your annual heat pump service today.