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Error code reference

Frigidaire Refrigerator Error Code EI

Ice sensor disconnection or short circuit.

Frigidaire codesFrigidaire refrigerator codes

Ice sensor disconnection or short circuit.

First step from the service manual

Measure the resistance between both terminals after separating CN11 of the Main PCB; if disconnected or short, replace the ice sensor in the automatic ice maker.

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

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What EI means on a Frigidaire refrigerator

The EI error code on a Frigidaire refrigerator indicates a fault in the ice sensor circuit within the automatic ice maker system. Specifically, the control board has detected either an open circuit (disconnection) or a short circuit at the ice sensor. This sensor monitors ice production conditions, and when the Main PCB loses a valid signal from it, the EI code is triggered to alert the technician that the circuit integrity has been compromised.

Diagnosing this fault begins at connector CN11 on the Main PCB. After unplugging the refrigerator and separating CN11, a resistance measurement should be taken across both terminals of the ice sensor. A reading of infinite resistance indicates an open circuit, meaning the sensor wiring or sensor element itself has broken continuity. A reading near zero ohms indicates a short circuit, where the circuit has lost its intended resistance path. Either condition confirms the sensor or its wiring has failed.

The ice sensor is a component of the automatic ice maker assembly. Causes can range from physical damage to the sensor wiring harness, corrosion at connector terminals, a failed sensor element, or wiring that has chafed and shorted against the freezer cabinet. Because the diagnostic step directly involves CN11 and resistance measurement, confirming the fault before replacing the sensor is important. If resistance values fall outside the expected range, replacing the ice sensor in the automatic ice maker is the recommended repair.

Source: manufacturer service documentation.

Common causes of EI

  1. 01

    Failed ice sensor

    Part replacement

    The ice sensor element itself can fail internally, resulting in an open or shorted circuit. This is the most direct cause and is confirmed by an out-of-range resistance reading at CN11 after the connector is separated.

  2. 02

    Loose or disconnected wiring at CN11

    Wiring / connection

    The connector CN11 at the Main PCB can work loose over time due to vibration, causing an open circuit condition. Inspecting the connector seating and terminal contact before condemning the sensor is a good first step.

  3. 03

    Damaged sensor wiring harness

    Part replacement

    The wiring between the ice sensor and CN11 can become chafed, pinched, or broken, especially near areas where harnesses are routed through the freezer wall or around moving parts. Physical inspection of the full harness length can reveal damage.

  4. 04

    Corroded or oxidized connector terminals

    Wiring / connection

    Moisture in the freezer compartment can cause corrosion at the CN11 connector terminals or the sensor connector, increasing resistance to the point where the control board reads the circuit as open or shorted. Corroded terminals may appear discolored or pitted.

  5. 05

    Main PCB fault

    Part replacement

    In rare cases the Main PCB itself may misread the sensor circuit due to a fault on the board at the CN11 input. This should only be considered after the sensor and wiring have been confirmed good through resistance testing.

See the test procedure for each cause

Frequently asked questions about EI

What does EI mean on a Frigidaire refrigerator?
The EI error code on a Frigidaire refrigerator indicates that the ice sensor in the automatic ice maker has either lost its electrical connection or has developed a short circuit. The Main PCB monitors the sensor through connector CN11, and when it detects an invalid resistance reading, it triggers the EI code. This fault directly affects the ice maker's sensing system and typically requires inspection of the sensor and its wiring.
How do I fix the EI error code on my Frigidaire refrigerator?
Start by unplugging the refrigerator, then locate connector CN11 on the Main PCB and separate it. Use a multimeter to measure resistance across both terminals of the ice sensor. If the reading shows infinite resistance or near-zero resistance, the ice sensor or its wiring is faulty. Inspect the wiring harness for damage or corrosion first, and if the sensor itself is the cause, replace the ice sensor in the automatic ice maker assembly.
Is it safe to keep using my refrigerator with the EI error code?
The refrigerator's cooling and food storage functions are generally not compromised by the EI error since it is specific to the ice maker sensor circuit. However, the automatic ice maker may not operate correctly while this fault is active. It is safe to continue using the refrigerator for food storage, but the ice maker should not be relied upon until the fault is resolved.
How much does it cost to fix the EI error on a Frigidaire refrigerator?
If only the ice sensor needs replacement, parts typically range from around $20 to $60 depending on the specific model. If a technician is needed to perform the diagnosis and repair, labor costs can add $80 to $150 or more to the total. In the less common scenario where the Main PCB is at fault, board replacement costs can range from $100 to $300 for parts alone.
Will resetting my Frigidaire refrigerator clear the EI error code?
A reset may temporarily clear the EI code from the display, but if the underlying fault in the ice sensor circuit remains, the code will return once the control board re-checks the sensor. Clearing the code without repairing the sensor or wiring is not a lasting solution. The proper fix requires confirming the sensor resistance at CN11 and replacing the faulty component.

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