Ice maker interior surfaces are covered with heavy white scale deposits.

Safety first: Unplug the unit. Use only manufacturer-approved descaling agents.

Descaling steps:

• Prepare descaling solution: Mix a recommended descaler or vinegar solution per Tristar guidelines.
• Run cleaning cycle: Fill the reservoir with the solution and run a cleaning or manual cycle, pausing to let the solution soak on the evaporator and water paths.
• Scrub surfaces: Use a soft brush to gently remove loosened scale from the evaporator, reservoir, and water tray.
• Rinse thoroughly: Flush the system with fresh water multiple times and discard the first batches of ice.
• Prevent recurrence: Use filtered water and perform regular cleaning as recommended in the manual.