E10 error appears and the freezer alarm sounds frequently, often with very high or very low displayed temperatures that do not match actual conditions.

Safety: Unplug the freezer before testing sensors or accessing the control board.

Steps to address E10 (sensor range/calibration):

• 1. Identify all sensors: New World digital freezers typically have a cabinet NTC, evaporator NTC, and sometimes an ambient NTC. Locate each using the wiring diagram if available.
• 2. Inspect harnesses: Follow each sensor’s wiring back to the main PCB. Look for crushed, pinched, or chafed cables that could cause shorts.
• 3. Measure sensor resistances: With the unit unplugged and sensors disconnected, measure resistance of each sensor at known temperatures (e.g., room temperature and after cooling with ice). Compare to typical NTC curves or service data. Any sensor reading far outside expected range is suspect.
• 4. Verify correct parts: If a sensor was replaced previously, confirm it is the correct New World NTC sensor type for your model. Incorrect values can trigger E10.
• 5. Replace faulty sensors: Replace any sensor with abnormal readings. Route wiring correctly and secure sensors in their original positions.
• 6. PCB evaluation: If all sensors and wiring are correct but E10 persists, the main control PCB may have a faulty analog‑to‑digital converter or corrupted calibration. PCB replacement is usually required.

Tip: Document resistance readings and temperatures; this information is useful if you need to consult a technician.