U-Line Ice Maker Error Code Bin T Open

The "Bin T Open" error code on a U-Line ice maker indicates that the bin thermistor circuit has been detected as open, meaning the electrical circuit carrying the signal from the bin thermistor to the main control board is broken or interrupted. The bin thermistor is a temperature-sensing resistor responsible for monitoring the temperature inside the ice storage bin. When the control board cannot read a valid resistance signal from this thermistor, it registers an open circuit condition and triggers this fault code to protect the unit from operating with unreliable temperature data.

The most common causes of this fault involve problems at the electrical connections rather than a failed thermistor component itself. Moisture or corrosion at the thermistor connector or at the point where the thermistor harness plugs into the main board can increase resistance to the point where the circuit reads as open. Ice makers operate in humid, low-temperature environments, which makes connector corrosion a frequent culprit. A visually clean connector may still have oxidation on the terminal contacts that disrupts the low-voltage signal.

If the wiring harness and all connection points check out visually and electrically as intact and corrosion-free, the thermistor itself has likely failed internally and will need replacement. A thermistor failure typically means the component's resistance has shifted far outside its expected range or it has developed an internal break, both of which the board interprets as an open circuit. Replacing the thermistor is a straightforward repair once wiring issues are ruled out.