E3 error appears and the unit stops mid-cycle; ice plate or evaporator does not frost properly.

Safety first: Disconnect power before accessing internal components near the evaporator.

• Step 1 – Access evaporator area: Remove the front or top cover to expose the ice-making evaporator plate on your Teendow model. Locate the small sensor clipped or glued to the evaporator surface.
• Step 2 – Inspect sensor and wiring: Check that the thermistor is firmly attached to the evaporator and that its wires are not pinched, cut, or corroded. Reseat the connector at both the sensor and the main control PCB.
• Step 3 – Clean contact area: If the thermistor has pulled away from the evaporator, clean the surface and reattach using thermal tape or the original clip so it can accurately sense temperature.
• Step 4 – Test thermistor (advanced): Using a multimeter, measure resistance across the thermistor leads and compare to Teendow specifications at room temperature. An open circuit or zero ohms indicates failure.
• Step 5 – Replace faulty parts: If the thermistor is out of spec, replace it with a Teendow-compatible evaporator temperature sensor. If a known-good sensor still triggers E3, the main control PCB may need replacement.