mypros+
Error code reference

U-Line Refrigerator Error Code E5

Thermistor 1 out of range +10°F above set-point for more than 12 hours.

U-Line codesU-Line refrigerator codes

Thermistor 1 out of range +10°F above set-point for more than 12 hours.

First step from the service manual

If the unit was just plugged in, leave for 24 hours to see if the problem is corrected. If it is not corrected, it is most likely a refrigeration system issue.

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 E5.

  • 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 E5 means on a U-Line refrigerator

The E5 error code on a U-Line refrigerator indicates that Thermistor 1 is reading a temperature more than 10°F above the unit's set-point for a continuous period exceeding 12 hours. Thermistor 1 is the primary temperature sensor responsible for monitoring the refrigerator compartment. When the refrigerator cannot maintain adequate cooling to stay within 10°F of its target temperature for that extended duration, the control board logs E5 as an active fault. This threshold exists to distinguish brief temperature swings, such as door openings or heavy loading, from a persistent failure to cool.

The 12-hour window built into this fault is significant. A unit that was recently plugged in, relocated, or restocked may legitimately take time to pull down to its set temperature, which is why the first diagnostic step is to allow 24 hours of runtime before drawing conclusions. If the error appears after normal operation has been established, the fault points toward an inability to maintain the refrigeration cycle rather than a sensor reading anomaly.

When the 24-hour observation period does not resolve E5, the diagnostic focus shifts to the refrigeration system itself. Possible culprits include refrigerant loss, a failing compressor, a restricted condenser, or a malfunctioning evaporator fan. A thermistor failure is less likely given the 12-hour sustained threshold, but a short or open circuit in the thermistor or its wiring harness should still be ruled out before condemning the sealed system.

Source: manufacturer service documentation.

Common causes of E5

  1. 01

    Refrigeration system failure

    Part replacement

    A refrigerant leak, compressor issue, or restricted refrigeration circuit is the most probable cause when E5 persists after the 24-hour startup period. The unit will run but produce little or no cooling, and the compressor may be unusually warm or cycling off on thermal overload.

  2. 02

    Dirty or blocked condenser

    Wiring / connection

    A condenser clogged with dust or debris prevents heat from dissipating, reducing cooling capacity and causing sustained high temperatures inside the cabinet. Inspect and clean the condenser coils and verify the condenser fan is operating.

  3. 03

    Evaporator fan not running

    Part replacement

    If the evaporator fan motor has failed, cold air will not circulate through the compartment even if the refrigeration system is working. Listen for fan operation when the door is closed and check for ice buildup that could be blocking the fan blade.

  4. 04

    Thermistor 1 failure or wiring fault

    Part replacement

    A faulty thermistor or a damaged wire in its circuit can cause the sensor to report an inaccurately high temperature, triggering E5 even when the cabinet is actually cold. Inspect the thermistor connector and wiring harness for corrosion, breaks, or loose connections.

  5. 05

    Unit recently plugged in or restocked

    Wiring / connection

    A newly installed or recently moved unit, or one that received a large load of warm items, may not have reached set-point temperature yet. Allow the unit 24 hours of uninterrupted runtime to determine if this is the cause.

See the test procedure for each cause

Frequently asked questions about E5

What does E5 mean on a U-Line refrigerator?
E5 means that Thermistor 1, the primary compartment temperature sensor, has been reading more than 10°F above the set-point for over 12 consecutive hours. The unit is failing to maintain its target temperature for a sustained period. If the refrigerator was recently plugged in, allow 24 hours before drawing conclusions. If it was already in normal operation, a refrigeration system issue is the most likely cause.
Will resetting the refrigerator clear the E5 error?
Unplugging the unit and plugging it back in may temporarily clear the error display, but the fault will return if the underlying problem is not resolved. Because E5 requires a sustained 12-hour temperature failure to trigger, it will reappear quickly if the refrigeration system or sensor is still not functioning correctly. A reset alone is not a repair.
How do I fix the E5 error on my U-Line refrigerator?
Start by allowing the unit to run for 24 hours if it was recently plugged in or moved. If the error persists, inspect the condenser coils for dirt or debris and verify that all fans are running. If basic checks do not resolve the issue, the refrigeration system itself likely requires diagnosis by a qualified technician, as a sealed system repair involving refrigerant is not a DIY procedure.
Is the E5 error on a U-Line refrigerator a safety concern?
Yes, because E5 indicates the compartment temperature is significantly above the set-point, perishable food stored inside may be at risk if the condition has persisted for an extended time. The FDA recommends discarding perishable items that have been held above 40°F for more than two hours. Until the fault is resolved, transfer temperature-sensitive items to another refrigerator.
How much does it cost to repair an E5 error on a U-Line refrigerator?
Repair costs vary widely depending on the root cause. A condenser cleaning is typically a low-cost service call, while an evaporator fan motor replacement may run anywhere from $100 to $300 including parts and labor. If the sealed refrigeration system requires repair, such as refrigerant recharge or compressor replacement, costs can range from $300 to $700 or more depending on the specific issue and labor rates in your area.

Related U-Line refrigerator codes

All U-Line refrigerator codes
View all 52 U-Line refrigerator codes

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

Get Started

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