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Error code reference

U-Line Refrigerator Error Code R Evap T Short

Right evaporator thermistor circuit is shorted.

U-Line codesU-Line refrigerator 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.

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What R Evap T Short means on a U-Line refrigerator

The R Evap T Short error code indicates that the right evaporator thermistor circuit has detected a short condition. The evaporator thermistor is a temperature-sensing resistor (thermistor) mounted near the evaporator coil on the right side of the refrigeration system. Its job is to continuously report coil temperature to the control board, which uses that data to regulate defrost cycles and compressor operation. When the circuit shorts, the resistance value drops abnormally low, sending an out-of-range signal that the control board interprets as a fault.

A shorted thermistor circuit typically produces a resistance reading near zero ohms, well outside the expected operating range for a standard NTC thermistor. This differs from an open circuit fault, where resistance reads infinitely high. The most common physical causes are wiring harness damage, including pinched cables, chafed insulation, or connectors that have corroded or been crushed during installation or service. Moisture intrusion into the connector can also create a low-resistance path between the signal wire and ground, mimicking a short.

Diagnosing this fault starts with a visual inspection of the thermistor cable routing from the evaporator coil back to the control board connector, checking specifically for pinch points where the harness may pass through panels or brackets. If the wiring appears intact, the thermistor itself should be tested with a multimeter. A shorted thermistor will need to be replaced, and any damaged wiring must be repaired to prevent the fault from recurring.

Source: manufacturer service documentation.

Common causes of R Evap T Short

  1. 01

    Pinched or damaged thermistor cable

    Wiring / connection

    The thermistor wiring harness can become pinched between panels or brackets during installation or prior service, crushing the insulation and causing the wires to short together. Inspect the full cable run for flat spots, kinks, or cuts.

  2. 02

    Failed evaporator thermistor

    Part replacement

    The thermistor component itself can fail internally, resulting in a near-zero resistance reading that registers as a short. Testing the thermistor with a multimeter will confirm if it has failed and needs replacement.

  3. 03

    Moisture or corrosion in the connector

    Wiring / connection

    Water or frost intrusion into the thermistor connector can create a conductive path between pins, producing a short circuit reading. Check the connector for discoloration, corrosion, or visible moisture.

  4. 04

    Chafed wiring insulation

    Part replacement

    Insulation that has worn through from contact with a sharp edge or vibrating component can allow the signal wire to contact a ground surface, shorting the circuit. Look for bare copper or worn spots along the harness.

  5. 05

    Faulty control board

    Part replacement

    In rare cases, the control board itself may misread a valid thermistor signal as a short due to an internal board fault. This should only be considered after the thermistor and wiring have been 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 refrigerator?
R Evap T Short means the control board has detected a short circuit in the right evaporator thermistor circuit. The thermistor is a temperature sensor located near the right evaporator coil, and a short causes it to send an abnormally low resistance reading to the control board. This prevents accurate temperature monitoring and can interfere with defrost and cooling operation. The fault is typically caused by damaged wiring, a failed thermistor, or moisture in the connector.
Can I fix the R Evap T Short error myself?
A knowledgeable DIYer can attempt this repair by first inspecting the thermistor cable for visible damage like pinching, chafing, or connector corrosion. If the wiring looks intact, the thermistor can be tested with a multimeter for a near-zero resistance reading, which confirms it needs replacement. Replacing the thermistor or repairing a damaged harness is generally straightforward, but gaining access to the evaporator area may require removing interior panels.
Is it safe to keep using my U-Line refrigerator while this error is active?
Operating the unit with an active R Evap T Short error is not recommended for extended periods. The control board cannot accurately read evaporator temperature on the right side, which may cause improper defrost timing or reduced cooling performance. Food safety could be at risk if temperatures are not maintained correctly. Address the fault as soon as practical to prevent potential food spoilage or further system issues.
How much does it cost to repair the R Evap T Short error on a U-Line refrigerator?
If only the thermistor needs replacement, parts typically cost in the range of $20 to $60 depending on the specific model. Professional labor to diagnose and replace the part can add $100 to $250 or more depending on your area and the technician's rates. If the wiring harness is damaged, repair costs vary based on the extent of the damage. Control board replacement, if ultimately needed, is the most expensive scenario and can range from $150 to $400 or more for parts alone.
Will resetting the refrigerator clear the R Evap T Short error?
A simple power reset may temporarily clear the error code, but the fault will return if the underlying cause has not been corrected. The control board will re-detect the short circuit in the thermistor circuit as soon as it runs a self-check. Clearing the code without repairing the wiring or replacing the failed thermistor is not a fix. A permanent resolution requires identifying and correcting the cause of the short.

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