Freezer temperature fluctuates; sometimes too warm, sometimes too cold.

Step 1: Verify with thermometer

• Place an appliance thermometer in the freezer and log temperatures over 24 hours.

Step 2: Inspect gasket and door usage

• Ensure the gasket seals well and doors are not opened excessively.

Step 3: Test thermistor

• Measure freezer thermistor resistance at known temperatures and compare to spec.
• Replace if readings are unstable or out of range.

Step 4: Check evaporator fan

• Listen for consistent fan operation; replace the fan motor if intermittent.

When to call a technician: If control board regulation is suspect, professional diagnosis is recommended.