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Error code reference

U-Line Refrigerator Error Code Evap T Short

Evaporator thermistor circuit is shorted.

U-Line codesU-Line refrigerator codes

Evaporator thermistor circuit is shorted.

First step from the service manual

Check thermistor cable for pinch points or damage; inspect wire harness from main control board 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 Evap T Short means on a U-Line refrigerator

The "Evap T Short" error code on a U-Line refrigerator indicates that the evaporator thermistor circuit has detected a short condition. The evaporator thermistor is a temperature-sensing resistor positioned near the evaporator coil inside the refrigerator's sealed cooling section. Under normal operation, the thermistor sends a resistance signal to the main control board that corresponds to the current evaporator temperature. When the circuit shorts, the resistance drops abnormally low, causing the board to read an out-of-range signal and trigger this fault code.

A shorted thermistor circuit most commonly results from physical damage to the wiring rather than failure of the thermistor sensor itself. Pinch points along the thermistor cable or wire harness, often caused during installation, service work, or component shifts over time, can cause the insulation to wear through and allow conductors to contact each other or a grounded metal surface. This creates the low-resistance short condition the board detects. Damage can also occur from moisture intrusion, ice buildup pressing against wiring, or a cable routed too close to a sharp edge.

Diagnosis should begin with a careful visual inspection of the entire thermistor cable and the wire harness running between the thermistor and the main control board. Look specifically for crushed sections, frayed insulation, melted spots, or areas where the cable contacts sheet metal. If the wiring appears intact, the thermistor itself may have internally shorted and will need to be tested for proper resistance values and replaced if readings are out of specification.

Source: manufacturer service documentation.

Common causes of Evap T Short

  1. 01

    Pinched or damaged thermistor cable

    Part replacement

    The thermistor cable may be caught in a pinch point caused by a panel, component, or edge inside the unit. Inspect the full cable run visually for crushed insulation or exposed wires.

  2. 02

    Damaged wire harness from main control board

    Part replacement

    The wire harness connecting the thermistor to the main control board can suffer insulation damage from sharp edges or improper routing. Check the entire harness length for fraying, cuts, or contact with metal surfaces.

  3. 03

    Internally shorted thermistor

    Part replacement

    The thermistor sensor itself can develop an internal short due to age, moisture exposure, or manufacturing defect. If the wiring inspects cleanly, test the thermistor's resistance and replace it if values are out of specification.

  4. 04

    Moisture or ice damage to wiring

    Part replacement

    Ice buildup or condensation in the evaporator compartment can press against or infiltrate the thermistor cable, degrading insulation and causing a short. Look for signs of ice contact marks or corrosion on connectors.

  5. 05

    Loose or corroded connector at the control board

    Wiring / connection

    A corroded or improperly seated connector at the main control board can create abnormal resistance readings that mimic a short. Inspect the thermistor connector pins for corrosion, bent contacts, or incomplete insertion.

See the test procedure for each cause

Frequently asked questions about Evap T Short

What does Evap T Short mean on a U-Line refrigerator?
Evap T Short means the evaporator thermistor circuit has detected a short condition. The evaporator thermistor is a temperature sensor located near the evaporator coil, and it communicates temperature data to the main control board. A short in this circuit prevents accurate temperature readings and triggers the fault code. The issue is typically found in the thermistor cable or the wire harness connecting it to the board.
Can I fix the Evap T Short error myself?
A knowledgeable DIYer can perform the initial visual inspection of the thermistor cable and wire harness for obvious damage, pinch points, or loose connectors. If damaged wiring or a failed thermistor is found, replacing those components is generally straightforward. However, if the wiring and thermistor both check out and the fault persists, the main control board may need professional evaluation.
Is it safe to keep using my refrigerator while the Evap T Short error is active?
Operating the refrigerator with this fault active is not recommended for extended periods. Without a functioning evaporator thermistor, the control board cannot properly regulate cooling cycles, which can lead to inconsistent temperatures and potential food safety concerns. Address the fault as soon as possible to restore normal operation.
How much does it cost to repair the Evap T Short error on a U-Line refrigerator?
If only the thermistor cable or the thermistor sensor itself needs replacement, repair costs are generally modest, typically in the range of $50 to $150 for parts and labor depending on your location and service provider. If the main control board has been damaged by the shorted circuit, costs can rise considerably into the $200 to $500 range or higher. Getting a professional diagnosis first helps clarify what components actually need replacement.
Will resetting the refrigerator clear the Evap T Short error code?
A power reset may temporarily clear the error code display, but the fault will return if the underlying wiring damage or component failure has not been corrected. Resetting should only be done after completing an inspection and any necessary repairs. Repeated resets without fixing the root cause will not restore proper thermistor function.

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