Ikea Dishwasher Error Code i6

The i6 error code on an Ikea dishwasher indicates a fault in the water temperature sensor circuit. This code is specific to the test cycle, meaning it will not appear during normal wash operation but is triggered when the machine runs its built-in diagnostic sequence. The temperature sensor, typically a negative temperature coefficient (NTC) thermistor, reports water temperature data to the control board. When the sensor's readings fall outside the expected range during the test cycle, the i6 code is logged.

The NTC thermistor works by changing its electrical resistance in response to temperature. The control board sends a small reference voltage through the sensor and reads back a resistance value that corresponds to a specific temperature. If the sensor is open-circuit, short-circuit, or producing readings outside of the acceptable window, the board interprets this as a sensor error and triggers i6. Poor wiring connections, corroded terminals, or a damaged sensor element are the most common causes of this failure.

Diagnosing i6 begins with verifying the actual water temperature in the machine, as an unusually cold or hot water supply can sometimes push sensor readings outside normal parameters. If the incoming water temperature is within a reasonable range, the next step is to inspect the sensor's wiring harness for damage or loose connectors, and then test the thermistor's resistance value directly with a multimeter to confirm whether the component itself has failed.