There are 4 areas of maintenance
Ice making System: Remove Scale
Sanitize Water System
Photo Eye ice level control
Filters and Air Cooled Condenser
The air filter located on the lower front grill will capture airborne dust during operation. As the dirt builds up, it begins to restrict air flow and causes the refrigeration system to work less efficiently.
Clean the air filter regularly.
The condenser fins require semi annual cleaning. Use caution to prevent damage to the condenser fins.
Source: MaintainX (Community Member)