Check compressor, fans, sensors, and sealed system.

Inspect fill tube, valve, and replace ice maker if needed.

Clear frozen line or replace faulty water valve.

Unclog defrost drain or fix cracked water line.

Replace defrost heater, sensor, or control board.

Check condenser fan or failing compressor.

Diagnose sealed system or thermistor issues.

Calibrate temps, check airflow, or replace control board.

Seal gasket or replace faulty ice tray module.

Reset power or replace the display/control board.