U-Line Ice Maker Zone T Short: Zone Sensor Circuit Shorted
If your U-Line ice maker shows Zone T Short, the zone thermistor circuit is bridged and the zone temperature is lost. Look to a damaged wire, a failed sensor or a damp connector.
What does U-Line ice machine code Zone T Short mean?
Zone T Short is the U-Line ice maker message for a bridged zone thermistor circuit. With the sensor path shorted, the signal is out of range and the zone temperature is lost to the control. The causes tied to this code are a pinched or damaged wire on the thermistor, a thermistor that no longer responds, or moisture on the connector. The message gives you the sensor and the kind of electrical problem, but not the precise place where the circuit is bridged.
Zone T Short at a glance
- Code
- Zone T Short
- Appliance
- U-Line ice machine
- Applies to
- U-Line ice makers with a zone temperature sensor
- Type
- Needs attention soon
- Can you clear it yourself?
- Sometimes, after the safe checks below
- Most likely cause
- A pinched or damaged wire on the zone thermistor
What you may notice with Zone T Short
- The display reads Zone T Short
- Ice production is reduced or absent
- The unit behaves differently from a normal cycle
- The area behind or beneath the cabinet feels damp
How the ice machine detects Zone T Short
Inside the ice maker, the zone thermistor reports one of the temperatures the control relies on. Like other thermistors, its resistance rises or falls as it warms and cools, and the board converts that resistance into a reading it can compare against what it expects at each stage of the cycle.
In a healthy circuit, the resistance sits inside a believable range. A bridged circuit pushes the resistance far toward one end, and the board decides the number cannot be a real temperature. It then raises Zone T Short rather than carry on with data that could mislead it. The result is a unit that may pause, limit or stop making ice until the sensor path is sound again.
Likely causes of Zone T Short
- A pinched or damaged wire on the zone thermistor
- A zone thermistor that has failed
- Moisture on the zone sensor connector
Can you keep using the ice machine with Zone T Short?
It is acceptable to leave the unit plugged in for a short time, but expect poor or no ice production. A damp connector is the one thing worth taking seriously, so if you see water near electrical parts, switch the ice maker off at the breaker and wait for a technician to check it.
What you can safely check
- Switch off the ice maker, pull the plug or flip the breaker off, and close the supply valve to the unit if it is nearby.
- Leave it off for a minute, then power up again.
- Check the floor and cabinet edges for water or condensation, without taking off any panel.
- Watch for Zone T Short when the unit restarts.
- If it comes back, call us and describe any moisture you found.
What our technician does for Zone T Short
- Inspect the zone thermistor wiring for pinched or rubbed insulation
- Check the connector for moisture and corrosion
- Test the sensor against its expected reading and replace it if needed
How to keep Zone T Short from coming back
- Fix drips from supply lines or fittings before they reach the connector area
- Wipe condensation from the cabinet base during humid summer weeks
- Do not pinch cables behind the unit when pushing it into place
- Keep cleaning sprays away from vents and rear panels
Technical reference
- Code
- Zone T Short
- Appliance
- U-Line ice machine
- Control family
- U-Line ice makers with a zone temperature sensor
- Maker documentation
- U-Line owner manuals and support
- Checked
- November 2026
Code meanings come from the maker’s documentation and our own repair work; we do not reprint the maker’s document. Confirm the full model number before acting on a code. We are an independent repair company, not affiliated with U-Line Corporation.
Related U-Line ice machine error codes
Zone T Short questions
What does a shorted thermistor actually do to the reading?
It sends the board a value far from any real temperature, because the circuit is bridged. The control recognizes that value as impossible and flags the sensor instead of acting on it.
Why does this code mention moisture?
Damp conditions around a connector can create a path between its contacts. That makes the sensor look shorted even if the thermistor itself is fine, which is why a technician checks the connector before replacing the sensor.
Will the unit make ice meanwhile?
It might make some, or it might stop, depending on how the control handles the bad reading. Do not count on a full batch until the sensor circuit has been tested.
Is this code the same as Bin T Short?
No. The wording is similar because both are shorted thermistors, but each names a different sensor. Zone T Short refers to the zone sensor, and the repair targets that particular wire and connector.
What happens if I ignore it?
The ice maker may keep running with limited control or stop making ice entirely. The message will usually keep returning until the wire, connector or sensor is dealt with, so it is better to have it checked.
Need help with Zone T Short?
A technician finds the cause at your bar or lanai and puts the price in writing before any part comes out.