The servicing requirements of a heat pump are not as onerous as a boiler however, there are disagreements as to whether the homeowner can undertake this or a service engineer is required.
With a Ground Source heat pump the requirements are more of a check than an activity, the closed loop collection system needs to be checked for the correct levels and efficacy as the fluid also serves as an anti-freeze. The heating system water pressure needs to be maintained and, if the installation has a mains pressure unvented hot water storage cylinder, the servicing requirements of that needs to be considered.
An Air Source heat pump requires the external unit to be kept free of leaves and debris, any filters within also need cleaning or replacing as specified by the manufacturer. And similar to a Ground Source heat pump, any unvented, mains water pressure cylinder needs to be serviced to the manufacturer’s instructions