Kenmore Ice Maker E1 Error: Thermistor / Temperature Sensor Fault
The kenmore ice maker e1 error is a fault signal from the control board — this guide walks through what it means, common causes, and safe diagnostic steps. What Does Kenmore Ice Maker Error Code E1 Mean? E1 on a Kenmore Elite 89183 or 89189 stand-alone under-counter ice maker stands for a thermistor fault. These […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. An E1 fault halts ice production and may leave the compressor or water pump in an indeterminate state. Do not rely on the unit for ice supply until the fault is cleared. Leaving the machine running in a fault state can accelerate wear on the compressor relay.
Can I reset the code?
No. E1 represents a live hardware fault. Unplugging and restoring power will clear the displayed code momentarily, but E1 returns within two minutes if the thermistor or its wiring remains faulty. A permanent fix requires either reseating a loose connector or replacing the failed thermistor.
When to stop immediately?
Stop if you notice: E1 returns within two minutes of any power reset after connector reseating, Thermistor reads open circuit (OL) on a multimeter at room temperature.
Symptoms You May Notice
Red LED flashes E1 pattern; ice production stops completely
The control board on Kenmore Elite 89xxx stand-alone units displays the E1 fault through a diagnostic LED sequence on the control panel. The harvest cycle halts and no new ice is produced until the fault is resolved.
Machine runs the freeze cycle longer than normal before stopping
Before fully halting, the unit may attempt extended freeze cycles because the board cannot confirm the target ice temperature has been reached without a valid thermistor reading, eventually timing out and locking out further production.
Audible click or relay chatter followed by machine shutdown
The control board may cycle the compressor on and off in short bursts as it attempts to read the thermistor and fails each time, resulting in an audible clicking from the relay and eventual full shutdown.
Freeze cycle starts but no harvest ever follows
The compressor kicks on and the unit appears to begin a freeze cycle, but the harvest sequence never initiates and no cubes drop into the bin, because the board has no valid thermistor reading to confirm the plate has reached harvest temperature.
Possible Causes
Faulty or disconnected thermistor probe
The thermistor (NTC temperature sensor) mounted on the evaporator plate or in the water reservoir has failed open-circuit, or its connector has vibrated loose from the control board harness — the most common cause on 89183/89189 units.
DIY PossibleThermistor wiring harness damage
The lead wires from the thermistor to the control board have been pinched, chafed against a sharp cabinet edge, or corroded at the connector terminals, causing an open or high-resistance circuit that the board interprets as a sensor failure.
DIY PossibleFailed control board thermistor input circuit
The thermistor input stage on the control board has failed, so even a fully functional thermistor reads as open-circuit on the board — replacing the thermistor alone does not clear E1 in this case.
Requires ProfessionalSafe Checks You Can Do
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1
Unplug and reseat the thermistor connector
Unplug the Kenmore Elite 89183/89189 unit and remove the front access panel (typically four screws). Locate the small thermistor probe clipped to the evaporator plate and trace its wiring harness to the connector on the control board. Unplug the connector, inspect the terminals for corrosion or bent pins, and firmly reseat it. Restore power and observe whether E1 clears within two minutes.
The thermistor connector on 89183/89189 units is a 2-pin JST-style connector prone to moisture corrosion in under-counter environments. A small amount of dielectric grease on the terminals after reseating prevents future corrosion faults.
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2
Test thermistor resistance at room temperature
With the unit unplugged, disconnect the thermistor connector and measure resistance across the two thermistor leads with a digital multimeter set to the 20k-ohm range. At room temperature (68–72 F), a healthy NTC thermistor on these Scotsman-platform units reads approximately 10,000 ohms (10 k-ohm). A reading of OL (open loop) or zero ohms confirms the thermistor has failed and must be replaced.
A reading that drifts or is unstable when you gently flex the lead wires indicates a broken conductor inside the insulation — replace the thermistor even if the static reading is within range.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Thermistor measures open-circuit at room temperature and the probe must be replaced — requires sourcing the correct Scotsman/Kenmore OEM part number
- E1 persists after confirmed-good thermistor installation, pointing to control board failure
- Wire harness continuity is broken between the thermistor and board connector and the harness must be replaced as an assembly
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