A U-Line clear ice machine E6 error is the shorted counterpart to E2: instead of losing the signal from the evaporator sensor entirely, the control is seeing a reading that’s out of range because the circuit has shorted.
Understanding the U-Line Clear Ice Machine E6 Error
Below, our specialists break down everything you need to know about the U-Line Clear Ice Machine E6 Error.
What the E6 code means
E6 flags thermistor 2, the evaporator sensor, as shorted. Because this sensor governs when the plate has reached freezing and when it’s warm enough to release the ice sheet during harvest, a short here removes the board’s ability to time the freeze/harvest cycle correctly.
Common causes
- An internally shorted evaporator thermistor
- Chafed or nicked wiring at the evaporator that allows the conductors to contact each other
- Condensation or water intrusion at the sensor connector, especially given how much water flows across the plate in a clear ice unit
- A connector damaged during a previous cleaning or service visit
Symptoms you may notice
- E6 on the display, often persistent rather than intermittent
- Harvest cycles that don’t trigger, or that trigger at the wrong point in the freeze cycle
- Cubes that are cloudy, thin, or incompletely formed because the plate never reaches or releases at the correct temperature
- Noticeably slower ice production as the system struggles with faulty feedback
How to troubleshoot it
- Unplug the unit before inspecting the evaporator sensor, its connector, or nearby wiring
- Look for moisture pooling near the evaporator connector, which is common on clear ice machines given the constant water flow over the plate
- Check the harness for any spot where insulation looks worn or where it may be contacting the metal evaporator housing
- Do not attempt to bridge or bypass the sensor circuit to force a cycle; this can mask the fault and stress other components
- A power cycle is unlikely to clear E6 if the short is real and persistent
- Confirm the water supply line and drain are otherwise functioning normally, since those are separate from this sensor fault
When to call a technician
E6 needs a technician’s attention. Confirming the short’s location and replacing the evaporator thermistor requires meter testing and safe access to the plate and control wiring.
Can you keep using it?
Hold off on regular use until it’s repaired. With the evaporator sensor shorted, freeze and harvest timing is unreliable, which typically shows up as poor ice clarity and can add unnecessary run time to the compressor.
U-Line clear ice machines are built and documented by the manufacturer in Milwaukee. Original documentation for these units is available from the manufacturer, u-line.com.
