Freezer displays L1 or LO and may not maintain a low temperature; sometimes this indicates low ambient temperature or a sensor misread.

Safety: No high-voltage work is typically needed; unplug before accessing sensors.

Steps:

• 1. Check installation location: Confirm the freezer is installed within Toshiba's specified ambient range (often 10–43°C). Very cold rooms can cause control errors.
• 2. Verify settings: Ensure the temperature is not set excessively low. Adjust to a moderate setting and monitor.
• 3. Inspect ambient sensor: Access the control panel area and check the ambient thermistor for secure mounting and intact wiring (see E4 procedure).
• 4. Reset control: Unplug the freezer for 5–10 minutes, then restore power to clear any temporary logic fault.
• 5. Replace sensor or PCB: If L1 persists in a normal ambient environment and the sensor tests faulty, replace the ambient thermistor. If the sensor is good, the main PCB may require replacement.