Electrolux Dishwasher Error Code i0 (6 blinks)

The i0 code, displayed as 6 blinks, means the dishwasher detected a heater fault during the wash cycle. The control board monitors water temperature through an NTC sensor and expects to see a rise of at least 1.5 degrees Kelvin within 3 minutes. When that increase is not detected, the fault is logged. The dishwasher will still finish the cycle, but without any heating.

A reset may clear the error code temporarily, but if the underlying fault is still present, the code will return as soon as the dishwasher attempts to heat water again during the next cycle. Resetting is useful for ruling out a one-time electronic glitch, but a recurring i0 code requires proper diagnosis and repair of the heater circuit.

Repair costs vary depending on which component has failed. A replacement flow-through heater or NTC sensor typically costs between $30 and $90 for the part, plus labor if a technician is involved. Control board repair or replacement is the most expensive scenario, often ranging from $150 to $350 or more depending on the board. Getting a diagnosis first helps avoid replacing parts unnecessarily.

Some parts of the diagnosis are DIY-friendly if you are comfortable using a multimeter. You can test the flow-through heater resistance, which should be around 25 ohms, and inspect wiring connectors for corrosion or damage. Replacing the NTC sensor is also a relatively straightforward repair. Control board relay repair or replacement is more involved and may be better handled by a qualified technician.

The dishwasher is designed to complete the cycle even with this fault active, so it will not abruptly stop mid-cycle. However, running the machine without heating means dishes are not being sanitized properly, and grease and food residue may not be fully removed. A failed heater relay or wiring fault should be inspected before continued use to rule out any electrical safety concerns.