Yes, you can maintain an air source heat pump yourself to a certain extent—routine tasks like cleaning or replacing air filters, checking airflow, and cleaning the coils can be handled by most homeowners with basic tools and care. These steps help keep the system running efficiently and prolong its lifespan. However, if your air source heat pump experiences refrigeration or electrical issues, it's best to call a qualified technician, as these repairs require specialized knowledge and tools to handle safely and effectively.