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Error code reference

U-Line Ice Maker Error Code Evap T Open

Evaporator thermistor circuit is open.

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What the Evap T Open error code actually means

Your U-Line ice maker has detected a problem with the temperature sensor located near the cooling coil inside the unit. This sensor has stopped sending a signal to the main control board, so the machine cannot monitor its own freezing process properly. The ice maker will not operate normally until this sensor or its wiring is inspected and repaired.

Diagnostic procedure

The full Evap T Open procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Inspect evaporator thermistor connection. Replace if necessary.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of Evap T Open

Ranked by how often they cause this code
  1. 1Loose or disconnected thermistor connector
  2. 2Failed evaporator thermistor
  3. 3Damaged wiring harness
  4. 4Corroded or oxidized connector terminals
  5. 5Control board failure

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Questions people ask about Evap T Open

What does Evap T Open mean on a U-Line ice_maker?
Evap T Open means the evaporator thermistor circuit is reading as open, which indicates the control board has lost its signal from the temperature sensor on the evaporator coil. This prevents the unit from monitoring its freeze cycle correctly. The fault is typically caused by a loose connector, a broken wire, or a failed thermistor sensor.
Is it safe to keep using my ice maker when the Evap T Open error is showing?
It is not recommended. The unit cannot accurately track evaporator temperatures without a functioning thermistor, which means ice production will be unreliable or will stop entirely. Continuing to run the unit in this state could also stress other components in the refrigeration system.
How much does it cost to repair the Evap T Open error on a U-Line ice maker?
If only a loose connector is involved, there may be no parts cost at all. If the evaporator thermistor needs replacement, parts alone typically run in the range of $20 to $60, depending on the specific model. Adding professional labor for diagnosis and replacement can bring the total repair cost to roughly $100 to $250.
Can I fix the Evap T Open error myself?
In many cases, yes. Start by unplugging the unit and locating the evaporator thermistor connector, then check that it is fully seated at both the sensor and the control board. If the connection is secure, you can test the thermistor with a multimeter for continuity. A confirmed open thermistor will need to be replaced, which is a manageable repair for someone comfortable working with appliance components.
Will resetting the ice maker clear the Evap T Open error?
A reset may temporarily clear the displayed error, but the code will return if the underlying problem with the thermistor circuit has not been resolved. The fault needs to be corrected physically, either by reseating the connector or replacing the thermistor, before the error will stay cleared.

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