Ice maker runs but no ice is harvested; display shows E2 after some time.

Safety first: Unplug the Gram ice maker before removing any panels.

• Access the evaporator area: Remove the front or side service panel (depending on model). Locate the evaporator plate where ice forms. The evaporator NTC sensor is usually clipped or bonded to the evaporator surface.
• Inspect sensor and wiring: Check the small two‑wire harness from the evaporator sensor to the main wiring loom. Look for cuts, crushed insulation, or corrosion at connectors. Reseat the connector at both the sensor and the control board.
• Test the sensor: Disconnect the sensor and measure its resistance with a multimeter at room temperature. Compare to the Gram service chart (typically 5–20 kΩ at 25°C). Infinite or near‑zero resistance indicates a failed sensor.
• Replace the sensor if defective: Unclip or unscrew the Gram evaporator NTC sensor, install the new one in the same position, ensuring good thermal contact with the evaporator surface. Route the harness away from sharp edges.
• Check control board if sensor is OK: If the sensor tests within spec and wiring is intact, the fault may be on the main control PCB. Inspect for burnt components or corrosion. Replacement of the PCB is recommended to be done by a qualified technician.