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Error code reference

Electrolux Ice Maker Error Code E9

Thermistor 4 open or shorted.

Electrolux codesElectrolux ice maker codes

Thermistor 4 open or shorted.

First step from the service manual

Replace thermistor. Check for thermistor errors by accessing 'View thermistor # status (19, 20, or 21).' If the error code is repeated, the thermistor is open or shorted. If a temperature is displayed, the thermistor is not defective.

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

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What E9 means on a Electrolux ice maker

The E9 error code on an Electrolux ice maker indicates a fault with Thermistor 4, which has been detected as either open or shorted. Thermistors are temperature-sensing resistors that provide real-time thermal feedback to the control board, allowing the ice maker to regulate freezing cycles, water temperature, and harvest timing. When Thermistor 4 fails in an open condition, the circuit is broken and no resistance signal reaches the board. When it fails in a shorted condition, the resistance value collapses abnormally, sending an out-of-range reading. In either case, the control board cannot trust the temperature data and triggers the E9 fault to prevent improper operation.

To confirm whether the thermistor itself is the source of the problem, the diagnostic procedure involves accessing the thermistor status menu and checking View Thermistor status options 19, 20, or 21. If the error code repeats during this check, the thermistor is confirmed open or shorted and requires replacement. If the display shows an actual temperature reading rather than repeating the error, the thermistor is functioning and the fault may have been intermittent or caused by a wiring issue between the sensor and the control board.

Common root causes include a failed thermistor element, damaged wiring harness connections, corrosion at the connector terminals, or in some cases a failing control board that misreads sensor input. Because the diagnostic menu can distinguish between a truly defective thermistor and a passing one, technicians should complete the status check before ordering parts to avoid unnecessary component replacement.

Source: manufacturer service documentation.

Common causes of E9

  1. 01

    Failed Thermistor 4 element

    Part replacement

    The thermistor itself has developed an open or shorted condition internally, meaning it is no longer sending a valid resistance signal to the control board. Confirm this by running the thermistor status check: if the error repeats instead of displaying a temperature, the thermistor is defective and must be replaced.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    Physical damage, pinching, or a loose connector on the wiring between Thermistor 4 and the control board can mimic an open or shorted thermistor. Inspect the harness and connector terminals for breaks, corrosion, or poor seating before replacing the sensor.

  3. 03

    Corroded connector terminals

    Wiring / connection

    Moisture inside the ice maker can cause oxidation at the thermistor connector pins, increasing resistance to the point where the board reads the circuit as open. Clean the terminals and reseat the connector, then rerun the diagnostic check to see if the fault clears.

  4. 04

    Intermittent thermistor fault

    Part replacement

    Some thermistor failures are intermittent rather than permanent, where the sensor passes the status check at certain temperatures but fails during operation. If the status check displays a temperature but the E9 code returns during normal cycles, replace the thermistor as a precaution.

  5. 05

    Faulty control board

    Part replacement

    In rare cases, the control board itself may misinterpret or fail to read a valid thermistor signal, generating a false E9 error. This should only be considered after the thermistor and wiring have been confirmed good through the diagnostic status menu.

See the test procedure for each cause

Frequently asked questions about E9

What does E9 mean on a Electrolux ice_maker?
The E9 code means that Thermistor 4 has been detected as open or shorted, indicating the temperature sensor is not providing a valid signal to the control board. The board cannot properly regulate the ice-making cycle without accurate thermal data from this sensor. You can confirm the fault by accessing the thermistor status menu: if the error repeats, the sensor is defective. If a temperature value is displayed, the thermistor itself may not be the problem.
How do I fix the E9 error on my Electrolux ice maker?
Start by accessing the thermistor status check under View Thermistor status options 19, 20, or 21. If the error repeats during this test, replace Thermistor 4. Before replacing the sensor, also inspect the wiring harness and connector terminals for damage or corrosion, since a wiring fault can produce the same symptoms as a failed thermistor.
Will resetting my Electrolux ice maker clear the E9 error?
A reset may temporarily clear the E9 code, but it will return if the underlying thermistor fault is still present. Because the control board continuously monitors the thermistor signal during operation, any persistent open or shorted condition will trigger the error again. The diagnostic status check is the proper way to determine whether the thermistor needs replacement before assuming a reset has resolved the issue.
Is it safe to keep using my ice maker while E9 is displayed?
Operating the ice maker with an active E9 fault is not recommended. Thermistor 4 provides temperature data that the control board relies on to manage the freezing and harvest cycle correctly. Without accurate sensor input, the machine may not produce ice properly or could operate outside of intended temperature parameters. It is best to diagnose and repair the fault before continuing regular use.
How much does it cost to fix the E9 error on an Electrolux ice maker?
If only the thermistor needs replacement, parts typically cost in the range of $15 to $50 depending on the specific model. If professional labor is involved, the total repair cost including diagnostics and installation generally falls in the range of $100 to $250. Costs can be higher if the wiring harness or control board also requires attention.

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