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Error code reference

LG Refrigerator Error Code dS r

Refrigerator defrost sensor error

LG codesLG refrigerator codes

Refrigerator defrost sensor error – the refrigerator defrost sensor circuit is open or short-circuited.

First step from the service manual

Check Pin11 to Pin12 of CON6 for loose connection; if normal, remove housing and check Orange to Orange wires; measure resistance per temperature table.

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

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What dS r means on a LG refrigerator

The dS r error code on an LG refrigerator indicates a fault in the refrigerator compartment defrost sensor circuit. Specifically, the control board has detected that the defrost sensor circuit is either open (broken circuit, no continuity) or short-circuited (unintended electrical path). This sensor is a thermistor, meaning its resistance changes predictably with temperature. The control board monitors this resistance to determine the temperature of the evaporator coil during and after a defrost cycle. When the measured resistance falls outside the expected range for the current temperature, the board flags the dS r fault.

The primary diagnostic starting point is the wiring harness connector CON6, specifically pins 11 and 12. A loose or corroded connection at this connector can interrupt the circuit and produce either an open or erratic signal. If the connector checks out, the next step is to trace the Orange-to-Orange wires from the connector back to the defrost sensor itself, inspecting for damage, chafing, pinching, or corrosion. Once wiring is ruled out, the sensor's resistance should be measured and compared against the manufacturer's temperature-resistance table to confirm whether the thermistor element has failed.

Common root causes include a failed defrost sensor thermistor, damaged wiring due to ice buildup or mechanical stress, and loose or oxidized connector pins at CON6. A defrost sensor that reads open typically has infinite resistance regardless of temperature, while a shorted sensor shows near-zero resistance. Either condition prevents accurate evaporator temperature monitoring, which can cause the refrigerator compartment to run too warm or trigger continuous defrost cycling.

Source: manufacturer service documentation.

Common causes of dS r

  1. 01

    Loose or corroded connector at CON6

    Wiring / connection

    A poor connection at pins 11 or 12 of the CON6 harness connector can break the circuit and trigger the dS r code. Inspect the connector for bent pins, corrosion, or incomplete seating and reseat or clean as needed.

  2. 02

    Failed defrost sensor thermistor

    Part replacement

    The thermistor element inside the defrost sensor can fail open or short, producing a resistance reading that falls completely outside the expected temperature-resistance table values. Resistance measurement at the sensor terminals will confirm this.

  3. 03

    Damaged Orange-to-Orange sensor wiring

    Wiring / connection

    The wiring between CON6 and the defrost sensor can become pinched, chafed, or broken, particularly if ice has formed around the wiring harness. Visually inspect the full wire run after removing the housing cover.

  4. 04

    Ice encasing the sensor or wiring

    Wiring / connection

    Excessive ice buildup in the refrigerator evaporator area can physically damage the sensor or its leads and may also cause intermittent electrical contact. A manual defrost of the compartment may temporarily clear the fault if ice is the cause.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor and all wiring check out correctly against the resistance table and the connector is secure, the control board itself may be misreading the circuit. This is the least common cause and should only be considered after all other components are verified.

See the test procedure for each cause

Frequently asked questions about dS r

What does dS r mean on a LG refrigerator?
The dS r code means the refrigerator compartment defrost sensor circuit has been detected as open or short-circuited by the control board. The defrost sensor is a thermistor that the board uses to monitor evaporator temperature during defrost cycles. This fault indicates the board is receiving an out-of-range or no signal from that sensor. The problem can be caused by a loose connector, damaged wiring, or a failed sensor.
Can I fix the dS r error myself on my LG refrigerator?
Some steps are DIY-friendly, such as checking the CON6 connector for a loose or corroded connection and inspecting the Orange-to-Orange wires for visible damage. Measuring the defrost sensor resistance requires a multimeter and the ability to compare your reading against a temperature-resistance table. Replacing the sensor itself is a moderate repair that many experienced DIYers can handle, but if the control board is at fault, professional service is recommended.
Is it safe to keep using my LG refrigerator when dS r is displayed?
A dS r fault means the refrigerator compartment is not able to properly monitor its defrost cycle, which can lead to ice buildup on the evaporator or inadequate cooling over time. Food safety could be at risk if the refrigerator compartment temperature rises above safe levels. It is best to address the fault promptly and monitor food temperatures in the meantime.
How much does it cost to repair the dS r error on an LG refrigerator?
If the fix is simply reseating a loose connector, there may be no parts cost at all. A replacement defrost sensor typically costs in the range of $15 to $50 for the part. If a professional technician is needed for diagnosis and repair, total service costs including labor generally range from $100 to $300 depending on location and the extent of the repair required.
Will resetting my LG refrigerator clear the dS r error code?
A power reset may temporarily clear the dS r code from the display, but the error will return if the underlying fault in the sensor circuit has not been corrected. Resetting without fixing the root cause means the refrigerator will continue operating without reliable defrost sensor data. The code should be diagnosed and resolved at the component level before considering the repair complete.

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