Digital display shows E3; unit may stop during freeze

Safety First: Disconnect power before accessing sensors.

• Locate freeze thermistor: Typically clipped to the evaporator or suction line. Confirm it is firmly attached to clean metal.
• Inspect for damage: Look for cracked sensor body, exposed wires, or corrosion at the connector. Repair or replace as needed.
• Test resistance: Measure thermistor resistance at known temperature and compare to Hoshizaki chart. Replace if out of range.
• Check routing: Ensure thermistor wires are not routed near high-voltage lines that could induce noise.
• Reset and observe: After correction, clear the error and monitor a full freeze cycle to ensure normal termination.

When to call a technician: If E3 returns with a known-good thermistor, the control board or refrigeration performance may be at fault.