Cleaning the hopper and fuel feed system. Cleaning the heat exchanger system. Cleaning exhaust pipes and resealing the venting system if needed. Verifying and adjusting the stove settings with proper gauges and meters. Mechanical and electric components may eventually wear out and need repair or replacement.
Many manufacturers now offer low cost, high value extended warranty on electrical components.
You can also benefit from professional advice that helps you improve stove performance and convenience with operating tips or advice on fuel. Finding competent in-home service should really be part of the buying decision, since service is needed at least on an annual basis. Many stove shops and service technicians offer a service plan that specifies a service schedule, what is covered, travel costs, and other details. One way to assess service is to ask for references. Experienced pellet burners reap rewards for shopping and planning carefully and learning to operate and maintain their pellet heating system.