In the UK, it is not a legal requirement to service an air conditioning system. However, it is good practice to have the system serviced regularly to ensure it is operating efficiently and effectively.
Air conditioning systems can lose their efficiency over time due to dirt and debris building up in the system - for example; the filters, the evaporator coil or the fan blades - and regular servicing can help to prevent this. A service typically includes cleaning or replacing the filters, checking for and sealing any refrigerant leaks, which is a requirement under the F Gas Regulations, and checking that all components are in good working order.
In addition to helping to maintain the efficiency of the system, regular servicing can also help to identify and fix any potential problems before they become major issues. This can help to extend the lifespan of the system and prevent costly breakdowns.
While it is not a legal requirement to service an air conditioning system in the UK, all manufacturers require regular servicing of their equipment as a condition of their warranty. It's important to check the terms of the warranty to see if this is the case.
Overall, while it may not be a legal requirement, regular servicing of an air conditioning system is good practice to ensure it is operating efficiently and effectively, to extend its lifespan and to keep your warranty valid.