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Error code reference

GE Refrigerator Error Code E3

Evaporator thermistor "sensor B" fault (out-of-range).

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Evaporator thermistor "sensor B" fault (out-of-range).

First step from the service manual

Clear the code by holding ON/OFF and pressing SET 4 times. If the error reappears, contact dealer or Viking Customer Service for qualified technician.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What E3 means on a GE refrigerator

The E3 error code on a GE refrigerator indicates a fault with the evaporator thermistor, referred to as "sensor B." This sensor monitors the temperature of the evaporator coil, which is a critical component in the sealed refrigeration system. The thermistor provides real-time temperature data to the control board, allowing the refrigerator to regulate defrost cycles and maintain proper cooling. When the control board detects a reading that falls outside the expected resistance or voltage range for that sensor, it logs E3 and alerts the user.

Out-of-range thermistor faults typically fall into two categories: the sensor itself has failed (either open-circuit, short-circuit, or drifted out of calibration), or there is a wiring issue between the sensor and the control board. Cold environments, repeated defrost cycles, and moisture exposure can degrade thermistor connections over time. A damaged harness connector, corroded terminal, or broken wire lead can produce the same out-of-range signal as a failed thermistor.

The first recommended step is to clear the stored code by holding the ON/OFF button and pressing SET four times. If the E3 code returns after clearing, the fault is persistent and requires hands-on diagnosis by a qualified technician. At that point, a technician will check the thermistor resistance against the expected specification and inspect the wiring harness for damage, corrosion, or loose connections before determining whether the sensor or a related component needs replacement.

Source: manufacturer service documentation.

Common causes of E3

  1. 01

    Failed evaporator thermistor (sensor B)

    Part replacement

    The thermistor itself may have drifted out of its calibrated resistance range or failed completely due to age or moisture damage. A technician can confirm this by measuring the sensor's resistance and comparing it to the specified value.

  2. 02

    Loose or disconnected wiring harness connector

    Wiring / connection

    The connector joining sensor B to the main wiring harness can work loose over time, especially with vibration and repeated thermal cycling. Inspecting and reseating the connector may resolve the fault without replacing any parts.

  3. 03

    Corroded or damaged wiring terminals

    Part replacement

    Moisture inside the freezer compartment can cause terminal corrosion at the thermistor connector, increasing resistance in the circuit and producing an out-of-range reading. Corroded terminals typically need to be cleaned or the connector replaced.

  4. 04

    Broken or pinched sensor wire

    Part replacement

    Physical damage to the wire lead running from sensor B to the control board, such as pinching during a previous repair or chafing against a sharp edge, can cause an open or short circuit that mimics a sensor failure.

  5. 05

    Control board fault

    Part replacement

    In less common cases, the main control board may misread the sensor signal due to a board-level component failure. This is typically only considered after the thermistor and all associated wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about E3

What does E3 mean on a GE refrigerator?
E3 indicates that the evaporator thermistor, called sensor B, is producing a reading outside the expected range. This sensor monitors the temperature of the evaporator coil and feeds that data to the control board. The fault can point to a failed sensor, a damaged wire, or a loose connector in the sensor circuit. If the code persists after a reset, a qualified technician should diagnose the root cause.
Can I fix the E3 error on my GE refrigerator myself?
The first step you can take yourself is clearing the code by holding the ON/OFF button and pressing SET four times. If the code comes back, the repair involves checking thermistor resistance values and inspecting wiring inside the unit, which requires technical knowledge and the correct tools. Most homeowners will need a qualified appliance technician for anything beyond the reset procedure.
Will resetting the refrigerator clear the E3 code?
Resetting can clear the E3 code if the fault was a temporary sensor glitch. To reset, hold the ON/OFF button and press SET four times. If the underlying problem, such as a failed thermistor or damaged wire, is still present, the code will reappear shortly after being cleared. A persistent E3 after reset means the fault needs hands-on diagnosis.
Is it safe to keep using my refrigerator when E3 is displayed?
An E3 fault means the control board is not receiving reliable temperature data from the evaporator sensor, which can affect how well the refrigerator manages its defrost cycle and cooling performance. Food safety may be at risk if cooling is compromised. It is best to address the fault promptly rather than continuing to run the unit with an active sensor error.
How much does it cost to repair a GE refrigerator E3 error?
Repair costs depend on what is actually causing the fault. Replacing an evaporator thermistor is generally a relatively affordable repair, with parts and labor typically ranging from around $100 to $250 depending on your location and the technician's rates. If the control board is the source of the problem, costs can be higher, often in the $200 to $500 range including parts and labor.

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