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Error code reference

Daewoo Refrigerator Error Code EF

Flow sensor error

Daewoo codesDaewoo refrigerator codes

Flow sensor error - no pulse detected during water supply (number of pulse signal below 10 by 1 sec during water supply).

First step from the service manual

Check water supply line.

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

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What EF means on a Daewoo refrigerator

The EF error code on a Daewoo refrigerator indicates a flow sensor fault, specifically that the water flow sensor is detecting fewer than 10 pulse signals per second during an active water supply event. The flow sensor is a hall-effect style device mounted in the water supply line that generates a series of electrical pulses proportional to water flow rate. When the control board commands a water dispense or ice maker fill cycle and does not receive the minimum pulse threshold from this sensor, it interprets the condition as a no-flow or insufficient-flow fault and triggers the EF code.

The most common root causes fall into two categories: mechanical restrictions that physically prevent water from flowing, and electrical or sensor failures that prevent the pulse signal from being generated or transmitted. On the mechanical side, a kinked supply line, a closed or partially closed inlet valve, low household water pressure, or a clogged inlet valve screen can all reduce flow below the detection threshold. A frozen water supply tube inside the freezer compartment is also a frequent culprit in refrigerators where the line routes through a cold zone.

On the electrical side, the flow sensor itself can fail, producing no pulse output even when water is present. Wiring harness damage, corroded connectors between the sensor and control board, or a faulty water inlet solenoid valve that does not open fully can also produce this error. Because the first diagnostic step is to check the water supply line, technicians should confirm water pressure at the inlet and visually inspect the line before pursuing sensor or board-level diagnostics.

Source: manufacturer service documentation.

Common causes of EF

  1. 01

    Closed or restricted water supply line

    Wiring / connection

    The shutoff valve behind the refrigerator may be fully or partially closed, or the supply line may be kinked. Check that the valve is fully open and the line has no bends or obstructions.

  2. 02

    Clogged water inlet valve screen

    Wiring / connection

    Sediment and mineral deposits can block the small filter screen at the water inlet valve, reducing flow below the 10-pulse-per-second threshold. Remove the inlet valve and inspect the screen for debris or scale buildup.

  3. 03

    Faulty or failed flow sensor

    Part replacement

    The hall-effect flow sensor can wear out or fail, causing it to produce no pulse signal even when water is flowing normally through the line. Replacing the sensor is required if water pressure and supply are confirmed adequate.

  4. 04

    Frozen water supply tube

    Wiring / connection

    The water line that routes through the freezer section can freeze solid, blocking all flow to the dispenser or ice maker. Inspecting and thawing the internal tube resolves this without replacing parts in most cases.

  5. 05

    Defective water inlet valve solenoid

    Part replacement

    The inlet valve solenoid may not be opening fully, restricting flow enough that the sensor cannot reach the minimum pulse count. A failed solenoid coil will require the inlet valve assembly to be replaced.

See the test procedure for each cause

Frequently asked questions about EF

What does EF mean on a Daewoo refrigerator?
The EF code on a Daewoo refrigerator indicates a flow sensor error. It means the control board detected fewer than 10 pulse signals per second from the water flow sensor during a water supply cycle. This tells the refrigerator that water is not flowing at an adequate rate, which can affect the dispenser and ice maker. The fault is triggered any time the measured flow falls below the minimum threshold the system expects.
How do I fix the EF error on my Daewoo refrigerator?
Start by checking that the water supply shutoff valve is fully open and the supply line is not kinked or pinched. Next, inspect the inlet valve screen for sediment or mineral buildup that could restrict flow. If the supply line and valve are clear and water pressure is adequate, the flow sensor itself may need to be tested and replaced. A frozen internal water tube is another possibility and can be resolved by allowing the refrigerator to thaw the line.
Is the EF error on a Daewoo refrigerator dangerous?
The EF error is not a safety hazard. It indicates a water flow detection problem rather than an electrical or temperature-related fault. Your food will remain safely refrigerated while this error is present. However, the dispenser and ice maker will likely not function correctly until the underlying flow issue is resolved.
Will resetting my Daewoo refrigerator clear the EF error?
A power reset may temporarily clear the error code from the display, but if the underlying cause has not been corrected the EF code will return the next time the refrigerator attempts to supply water. A reset alone is not a fix. The water supply line, inlet valve, and flow sensor must be inspected and the root cause corrected to permanently clear the fault.
How much does it cost to repair the EF error on a Daewoo refrigerator?
Repair costs depend on the cause. If the fix is simply opening a shutoff valve or straightening a kinked supply line, there is no parts cost. Replacing a clogged inlet valve screen or thawing a frozen tube involves minimal expense. If the flow sensor or water inlet valve assembly needs replacement, parts typically range from $20 to $80, with professional labor adding $75 to $150 or more depending on your location and the technician.

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