U-Line Ice Maker Error Code E5

The E5 code on a U-Line ice maker means that Thermistor 1, the temperature sensor for the refrigerator zone, has been detected as shorted by the control board. A shorted thermistor produces an abnormal resistance reading that prevents accurate temperature monitoring. The unit will not operate reliably until the fault is diagnosed and corrected.

Continuing to run the unit with an active E5 fault is not recommended. Without accurate refrigerator zone temperature data, the control board cannot regulate cooling properly, which could result in inadequate food or ice preservation and potential stress on the compressor and refrigerant system. The unit should be serviced before returning it to regular use.

Repair costs depend on the root cause. A replacement thermistor is typically an inexpensive part, with the sensor itself often ranging from $15 to $50 depending on the specific model. If the control board is at fault, that cost increases significantly, generally ranging from $150 to $400 or more for parts alone. Adding professional labor will increase the total cost of the repair.

A knowledgeable DIYer can perform the initial diagnostics, including inspecting the wiring harness, checking connector terminals for corrosion or moisture, and performing an OHM test on the thermistor. If the thermistor tests shorted, replacing the sensor is a straightforward repair for someone comfortable working with appliance wiring. If the wiring and thermistor both test normal, the control board may need professional evaluation.

A simple power reset will not permanently clear the E5 code if the underlying fault is still present. The control board will re-detect the shorted thermistor and display the error again once it runs through its diagnostics. The fault will only clear after the defective component, whether the thermistor itself or the associated wiring, is repaired or replaced.