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Error code reference

Daewoo Washer Error Code E4

Load sensing error

Daewoo codesDaewoo washer codes

Load sensing error: after load sensing operates about 7 seconds, the message is displayed during 1 second and water level is always fixed to 'high', indicating water level sensing is inferior.

First step from the service manual

Check the water level sensor and the contact part of the connector; change the P.C.B. ASS'Y if defective.

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

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What E4 means on a Daewoo washer

The E4 error code on a Daewoo washer indicates a load sensing fault. During the load sensing cycle, the machine runs a brief detection routine lasting approximately 7 seconds to assess the size of the laundry load. If the sensing process fails to produce a valid reading within that window, the E4 code displays for 1 second and the control system defaults to the high water level setting as a failsafe. This behavior points to a problem with the water level sensing circuit, which is unable to communicate accurate pressure or load data back to the main control board.

The water level sensor, also called a pressure sensor or pressure switch, works by detecting the air pressure in a sealed chamber connected to the wash tub. As the tub fills, water compresses air in the chamber, and the sensor translates that pressure into an electrical signal read by the PCB. When the sensor itself is defective, or when the connector between the sensor and the control board has a poor or broken contact, the PCB receives no valid signal and treats the condition as a high water level input. Contamination, corrosion on the connector pins, or a damaged sensor element can all interrupt this signal path.

Diagnosis should begin by physically inspecting the water level sensor and tracing the wiring harness to the connector at the PCB. Check connector pins for corrosion, bent terminals, or loose seating. If the connector and wiring appear intact and the sensor itself tests defective, replacement of either the sensor or the full PCB assembly may be required. In cases where the sensor and connections are confirmed good but the fault persists, the PCB itself may be misinterpreting the sensor signal and will need to be replaced.

Source: manufacturer service documentation.

Common causes of E4

  1. 01

    Faulty water level sensor

    Part replacement

    The pressure-based water level sensor may have a failed internal element, preventing it from sending a valid signal to the control board. The sensor should be tested for proper output; if readings are absent or out of range, the sensor needs replacement.

  2. 02

    Loose or corroded connector at the water level sensor

    Wiring / connection

    The wiring harness connector linking the water level sensor to the PCB can develop corrosion, bent pins, or a loose fit over time. Inspecting and reseating or cleaning the connector is the recommended first physical check.

  3. 03

    Damaged wiring between sensor and PCB

    Wiring / connection

    Wires in the harness running from the water level sensor to the main board can develop breaks or shorts due to vibration or pinching. Visually trace the harness and test for continuity across the full wire run.

  4. 04

    Defective PCB assembly

    Part replacement

    If the sensor and all wiring connections check out as good, the main PCB may be failing to read or process the sensor input correctly. In this case, replacing the PCB assembly is the prescribed repair.

See the test procedure for each cause

Frequently asked questions about E4

What does E4 mean on a Daewoo washer?
The E4 code on a Daewoo washer indicates a load sensing error. After the washer runs its 7-second load sensing routine, it cannot get a valid reading from the water level sensor, so the code appears briefly and the machine locks into the high water level setting. The root cause is typically a defective water level sensor or a faulty connection between the sensor and the main control board.
Can I fix the E4 error myself?
Some aspects of this repair are DIY-friendly. Start by unplugging the washer and locating the water level sensor and its connector, then check for corrosion, loose pins, or disconnected wiring. Reseating the connector and cleaning the terminals may resolve the error. If the sensor itself is bad or the PCB needs replacement, those repairs typically require sourcing the correct parts and basic appliance repair skills.
Is it safe to keep using my washer while the E4 code is active?
The washer will continue to operate with the E4 code active, but it will default to using the high water level for every cycle, regardless of load size. This wastes water and can stress the pump and motor over repeated cycles. It is best to diagnose and repair the fault promptly rather than running the machine indefinitely in this condition.
Will resetting the washer clear the E4 error?
A reset may temporarily clear the displayed code, but the underlying fault in the water level sensing circuit will remain. As soon as the washer attempts the load sensing routine again, the E4 code will return. A permanent fix requires repairing or replacing the water level sensor, the connector, or the PCB assembly depending on what the diagnosis reveals.
How much does it cost to repair a Daewoo washer E4 error?
Repair costs vary based on which component is at fault. A water level sensor replacement typically runs in the range of $15 to $60 for the part alone, while a full PCB assembly can range from $80 to $200 or more depending on availability. Adding professional labor costs, a technician visit can bring the total to anywhere from $100 to $300 or higher depending on your location and the parts required.

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