mypros+
Error code reference

U-Line Ice Maker Error Code R Evap T Short

Right evaporator thermistor circuit is shorted.

U-Line codesU-Line ice maker codes

Right evaporator thermistor circuit is shorted.

First step from the service manual

Inspect thermistor cable for pinch points or damage. Replace if necessary.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for R Evap T Short.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What R Evap T Short means on a U-Line ice maker

The R Evap T Short error on a U-Line ice maker indicates that the right evaporator thermistor circuit has developed a short condition. The evaporator thermistor is a temperature-sensing resistor positioned near the right evaporator coil. It continuously reports temperature data to the control board so the unit can regulate freezing cycles, harvest timing, and defrost operations. When the circuit shorts, the resistance in the thermistor circuit drops abnormally low, sending an out-of-range signal to the control board, which then triggers this fault code and typically halts normal ice production to protect the system.

A shorted thermistor circuit is distinct from an open circuit failure. In a short, two conductors in the wiring harness are making unintended contact with each other or with ground, collapsing the resistance reading rather than eliminating it entirely. This is commonly caused by physical damage to the thermistor cable, such as pinching between panels or components during installation or servicing. Chafed insulation, moisture intrusion at connector points, or a thermistor probe that has been crimped against a metal surface can all create the low-resistance condition the control board interprets as a short.

Diagnosis begins with a thorough inspection of the thermistor cable routing from the probe tip at the evaporator through to its connector at the control board. Look for pinch points, crushed sections of cable, or areas where insulation has worn through. If the cable and connector appear intact, the thermistor itself may have failed internally. Resistance testing across the thermistor terminals at a known ambient temperature can confirm whether the component is within its expected range or has shorted internally.

Source: manufacturer service documentation.

Common causes of R Evap T Short

  1. 01

    Pinched or crushed thermistor cable

    Part replacement

    The thermistor cable can become pinched between panels, brackets, or other components, causing the insulation to break down and the wires inside to contact each other. Carefully trace the full length of the cable and look for any flattened or compressed sections.

  2. 02

    Damaged cable insulation

    Part replacement

    Abrasion against sharp metal edges over time can wear through the wire insulation and allow conductors to short together or to the chassis ground. Inspect the cable for any areas where the outer jacket appears frayed, cracked, or missing.

  3. 03

    Moisture or ice intrusion at the connector

    Wiring / connection

    Water or ice buildup at the thermistor connector can bridge the terminals and create a short circuit. Check the connector for corrosion, visible moisture, or ice accumulation and dry and clean it thoroughly before retesting.

  4. 04

    Failed thermistor probe

    Part replacement

    The thermistor itself can fail internally, resulting in a resistance value well below the normal operating range that the control board reads as a short. If the cable and connector check out visually and electrically, resistance testing across the thermistor terminals will confirm an internal failure.

  5. 05

    Faulty control board

    Part replacement

    In rare cases, a control board with a damaged input circuit can falsely report a short even when the thermistor and its wiring are within specification. This should only be considered after the thermistor and cable have been tested and confirmed good.

See the test procedure for each cause

Frequently asked questions about R Evap T Short

What does R Evap T Short mean on a U-Line ice_maker?
R Evap T Short means the control board has detected a shorted circuit in the right evaporator thermistor. The thermistor is a temperature sensor positioned near the right evaporator coil, and its resistance has dropped to an abnormally low level, indicating a short in the wiring or the sensor itself. The ice maker will typically suspend normal ice production until the fault is resolved.
Can I fix the R Evap T Short error myself?
A homeowner with basic mechanical skills can inspect the thermistor cable for visible pinch points, physical damage, or moisture at the connector, and cleaning or repositioning the cable may resolve the issue. However, resistance testing of the thermistor and any wiring repairs or component replacements typically require a multimeter and some familiarity with appliance wiring. If you are not comfortable with electrical diagnostics, a qualified appliance technician is recommended.
Is it safe to keep using my U-Line ice maker while this error is displayed?
You should not attempt to bypass or ignore this error code. The ice maker has suspended normal operation because the control board cannot accurately monitor evaporator temperatures, which means freezing and harvest cycles cannot be managed correctly. Continued operation without a functioning thermistor circuit risks ice quality issues and potential damage to the compressor or evaporator system.
Will resetting the ice maker clear the R Evap T Short error?
A reset may temporarily clear the fault display, but the error will return immediately if the underlying short in the thermistor circuit has not been corrected. The control board continuously monitors the thermistor signal during operation, so any persistent short condition will retrigger the fault code. The root cause must be diagnosed and repaired for the unit to operate normally.
How much does it cost to repair the R Evap T Short error on a U-Line ice maker?
Repair costs vary depending on what has failed. If only the thermistor needs replacement, parts and labor typically fall in the range of $100 to $250. If the wiring harness requires repair or replacement, or if the control board is found to be at fault, costs can rise to the $200 to $500 range or higher depending on your location and the specific model. Getting a diagnostic estimate from a certified technician before authorizing repairs is advisable.

Related U-Line ice maker codes

All U-Line ice maker codes
View all 61 U-Line ice maker codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass