Electrolux Dishwasher Error Code i0 (7 blinks)

The i0 error code, displayed as 7 blinks, indicates that the control board has detected a short circuit or open circuit in the NTC temperature sensor circuit. The NTC sensor monitors wash water temperature, and the expected resistance at 25 degrees Celsius is approximately 4843 ohms. When the sensor or its wiring falls outside the acceptable resistance range, the control board triggers this fault. The dishwasher will continue running its cycle to completion but will not activate the heating element.

The dishwasher is designed to complete its cycle without heating when the i0 fault is present, so it will not create an immediate safety hazard by running. However, because the water is not being heated, dishes will not be properly sanitized and drying performance will be poor. It is best to address the fault promptly rather than continuing to run cycles with degraded performance.

A power reset may temporarily clear the error code from the display, but the fault will return as soon as the control board polls the NTC sensor again and receives an out-of-range reading. Because the i0 code reflects an actual electrical fault in the sensor circuit, clearing it without addressing the underlying problem will not restore heating function. A lasting fix requires diagnosing and repairing or replacing the faulty sensor or wiring.

A knowledgeable DIYer can diagnose and often repair this fault by testing the NTC sensor resistance with a multimeter and inspecting the wiring harness for damage or corrosion. If the sensor reads far from 4843 ohms at 25 degrees Celsius, replacing the sensor is a straightforward repair. Wiring repairs and connector cleaning are also within reach for someone comfortable working with appliance electronics. If the control board is at fault, that repair is more complex and may warrant professional service.

If only the NTC temperature sensor needs replacement, parts typically cost in the range of $15 to $50 depending on the specific model, making it one of the more affordable dishwasher repairs. If professional labor is involved, total repair costs can range from $100 to $250. A control board replacement, if required, will increase costs significantly, often ranging from $150 to $400 or more for parts and labor combined.