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Error code reference

Electrolux Dishwasher Error Code i70

NTC thermistor value out of range

Electrolux codesElectrolux dishwasher codes

NTC thermistor value out of range — voltage across NTC terminals must be between 0.04V and 4.7V; checked immediately after program start (10s timeout).

First step from the service manual

Check NTC thermistor wiring and resistance; heater is disabled and cycle continues without heating.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What i70 means on a Electrolux dishwasher

The i70 error code on an Electrolux dishwasher indicates that the NTC thermistor is reporting a voltage value outside the acceptable operating range. The control board monitors the voltage across the NTC thermistor terminals and expects a reading between 0.04V and 4.7V. This check is performed automatically within 10 seconds of program start. If the voltage falls outside this window, either reading too low (suggesting a short circuit or flooded sensor) or too high (suggesting an open circuit or disconnected sensor), the board flags the fault immediately.

The NTC thermistor is a temperature-sensing resistor located in the wash tub, typically near the heating element or sump area. Its resistance changes predictably with water temperature, and the control board converts that resistance into a voltage reading to monitor wash and rinse temperatures in real time. When the i70 fault is active, the control board disables the heating element entirely as a protective measure. The dishwasher cycle continues running, but without any heating, meaning wash and rinse performance will be significantly degraded.

Common causes include a failed thermistor with an internal short or open circuit, damaged wiring between the thermistor and the control board, corroded or loose connector terminals, or water intrusion into the sensor housing. In rarer cases, the control board itself may misread the signal due to a board fault. Because the heater is disabled during an i70 condition, dishes will not be sanitized and drying performance will be poor until the fault is resolved.

Source: manufacturer service documentation.

Common causes of i70

  1. 01

    Failed NTC Thermistor

    Part replacement

    The thermistor itself has developed an internal open or short circuit, pushing the voltage reading outside the 0.04V to 4.7V range. This can be confirmed by measuring the thermistor's resistance directly and comparing it to expected values for a known temperature.

  2. 02

    Loose or Disconnected Wiring Connector

    Wiring / connection

    A connector that has vibrated loose or was not fully seated at the thermistor or control board will cause the voltage signal to drop out entirely, triggering the fault. Inspect both ends of the thermistor wiring harness for secure connection.

  3. 03

    Corroded or Damaged Wiring

    Wiring / connection

    Moisture inside the dishwasher can corrode terminal pins or damage wire insulation, creating high resistance or intermittent open circuits in the thermistor signal path. Visually inspect the wiring harness along its full length for corrosion, pinching, or breaks.

  4. 04

    Water Intrusion into Thermistor Housing

    Part replacement

    If water has entered the sensor body, it can short the thermistor terminals and force the voltage reading below 0.04V. Look for signs of moisture or mineral deposits around the sensor mounting point.

  5. 05

    Faulty Control Board

    Part replacement

    If the thermistor and all wiring check out correctly, the control board may be misreading or misprocessing the voltage signal. This is the least common cause and should only be considered after all other components have been tested and cleared.

See the test procedure for each cause

Frequently asked questions about i70

What does i70 mean on a Electrolux dishwasher?
The i70 code means the control board detected a voltage reading from the NTC thermistor that is outside the acceptable range of 0.04V to 4.7V. This check happens within 10 seconds of starting a program. Because the temperature sensor reading is unreliable, the dishwasher disables the heater and continues the cycle without heating. The root cause is usually a failed thermistor, a loose connector, or damaged wiring.
Can I fix the i70 error myself?
Some causes of the i70 error are DIY-friendly. Start by checking that the thermistor wiring connectors are fully seated at both the sensor end and the control board end. You can also test the thermistor's resistance with a multimeter to determine if the sensor itself has failed. If the thermistor needs replacement, it is generally a straightforward part swap for someone comfortable working inside a dishwasher. Control board faults are more complex and may warrant a professional technician.
Will resetting the dishwasher clear the i70 error?
A power reset may temporarily clear the i70 code, but if the underlying fault in the thermistor or wiring is still present, the error will return within 10 seconds of starting the next cycle. A reset alone does not fix the problem. The fault must be diagnosed and the defective component repaired or replaced for the error to stay cleared.
Is it safe to keep using the dishwasher with the i70 error active?
The dishwasher is designed to continue running with i70 active, but without the heating element engaged. This means water will not reach proper wash temperatures, dishes will not be sanitized, and drying performance will be poor. There is no immediate safety hazard from running the machine in this state, but hygiene concerns from inadequately heated water mean the fault should be repaired promptly.
How much does it cost to repair an i70 error on an Electrolux dishwasher?
Repair costs depend on the failed component. A replacement NTC thermistor is generally an inexpensive part, often in the range of $10 to $40, making it one of the more affordable dishwasher repairs if you do it yourself. Professional labor adds $75 to $150 or more depending on your location. If the control board is at fault, total repair costs including parts and labor can range from $150 to $350 or higher.

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