Freezer interior temperature fluctuates widely – sometimes too warm, sometimes too cold.

Safety: Unplug the freezer before accessing controls or wiring.

Steps to stabilize temperature:

• 1. Confirm stable power: Avoid using extension cords or shared outlets with heavy appliances.
• 2. Inspect cabinet sensor: Check the cabinet NTC temperature sensor and its wiring for loose connections or damage. Reseat connectors.
• 3. Test sensor: Measure resistance at different temperatures (e.g., room temperature and after cooling in ice water). Replace if readings are erratic.
• 4. Check control knob or UI: Ensure the thermostat knob is not cracked or slipping on its shaft. For electronic controls, verify buttons are not sticking.
• 5. Replace control PCB if needed: If sensor and wiring are good but fluctuations persist, the main control PCB may be faulty.

Tip: Use a freezer thermometer to monitor performance after repairs.