Electrolux Ice Maker Error Code E1

The E1 error code on an Electrolux ice maker indicates that Thermistor 1 is open, meaning the thermistor circuit is broken and the control board is receiving no valid signal from that sensor. A thermistor is a temperature-sensitive resistor whose resistance changes predictably with temperature. When the circuit is open, the resistance reads as infinite, which falls outside the acceptable range for normal operation. The control board interprets this as a fault condition and triggers the E1 code to prevent the unit from operating on faulty temperature data.

Thermistor 1 is part of the ice maker's temperature monitoring system. The unit relies on accurate thermistor readings to control the freeze cycle, harvest cycle timing, and overall ice production. Without a valid reading from Thermistor 1, the system cannot confirm proper operating temperatures and will halt normal function. The cause is typically a failed thermistor internally, though a wiring break, corroded connector, or damaged harness between the thermistor and the control board can also produce an open circuit condition.

Diagnosis is performed through the unit's service mode using option 19, 20, or 21 to view the thermistor status directly. If the service mode displays a temperature value for Thermistor 1, the sensor itself is functioning and the problem may be intermittent or resolved. If the error code is repeated in service mode rather than a temperature reading, the thermistor is confirmed as open or shorted and replacement is required. Technicians should inspect the wiring harness and connector terminals for damage or corrosion before condemning the thermistor itself.