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Error code reference

Daewoo Refrigerator Error Code R2

R2-sensor (refrigerator sensor 2) malfunction due to short circuit or wire disconnection.

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R2-sensor (refrigerator sensor 2) malfunction due to short circuit or wire disconnection.

First step from the service manual

Check R2-sensor for short circuit or wire disconnection. Low cooling prevention function by R2-sensor is disabled.

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
  • Verified part numbers when replacement is required
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What R2 means on a Daewoo refrigerator

The R2 error code on a Daewoo refrigerator indicates a malfunction in the R2 sensor, which is the second refrigerator compartment temperature sensor. This fault is triggered when the control board detects either a short circuit in the sensor circuit or a complete wire disconnection. The R2 sensor provides real-time temperature data to the main control board, allowing the refrigerator to regulate cooling cycles precisely. When this sensor fails or loses its signal, the board cannot accurately monitor compartment conditions.

A critical consequence of the R2 error is that the low cooling prevention function associated with this sensor is disabled. This means the refrigerator loses an important protective feature that normally prevents the compartment from dropping below safe temperature thresholds. Without this safeguard active, temperature regulation becomes unreliable, which can affect food safety and compressor operation over time.

Diagnosing this fault requires physically inspecting the R2 sensor and its wiring harness. A short circuit will typically show near-zero resistance between the sensor leads or between a lead and ground, while a wire disconnection will produce an open circuit with no continuity. The sensor connector and any inline connections along the harness should also be inspected for corrosion, physical damage, or loose terminals before replacing the sensor itself.

Source: manufacturer service documentation.

Common causes of R2

  1. 01

    Broken or disconnected sensor wire

    Part replacement

    The wiring harness leading to the R2 sensor can become pinched, cracked, or pulled loose over time, resulting in an open circuit. Inspecting the harness from the sensor to the control board connection point will reveal any visible breaks or disconnections.

  2. 02

    Short circuit in sensor wiring

    Part replacement

    Chafed or damaged insulation along the wire run can allow two conductors to contact each other or a grounded surface, causing a short. A multimeter continuity test between wire leads and the refrigerator chassis can confirm this condition.

  3. 03

    Failed R2 sensor

    Part replacement

    The sensor itself can fail internally due to age or moisture exposure, producing a resistance value outside the expected range for its operating temperature. Testing the sensor resistance at room temperature and comparing it to expected values will confirm whether the component has failed.

  4. 04

    Corroded or loose connector

    Wiring / connection

    The connector joining the R2 sensor to the wiring harness can develop corrosion or work loose, interrupting the signal to the control board. Carefully unplugging and inspecting the connector pins for oxidation or bent terminals can identify this issue.

  5. 05

    Control board fault

    Part replacement

    In less common cases, the main control board may incorrectly report an R2 sensor error due to a board-level failure even when the sensor and wiring are intact. This should be considered only after the sensor circuit has been fully tested and confirmed good.

See the test procedure for each cause

Frequently asked questions about R2

What does R2 mean on a Daewoo refrigerator?
The R2 error code indicates a malfunction in the second refrigerator compartment temperature sensor, caused by either a short circuit or a wire disconnection in the sensor circuit. When this fault is active, the low cooling prevention function tied to that sensor is disabled. This means the refrigerator cannot reliably protect the compartment from temperature irregularities. The sensor and its wiring harness should be inspected promptly.
Can I fix the R2 error on my Daewoo refrigerator myself?
A knowledgeable DIYer can diagnose this error by visually inspecting the R2 sensor wiring for damage and testing continuity with a multimeter. If the issue is a loose connector, it can often be reseated without special tools. Replacing the sensor or wiring harness requires basic appliance repair skills and sourcing the correct replacement part for your model.
Is it safe to keep using my refrigerator while the R2 error is displayed?
Using the refrigerator with an active R2 error carries some risk because the low cooling prevention function tied to the R2 sensor is disabled. This means the appliance may not maintain accurate temperatures in the fresh food compartment, which could affect food safety. It is advisable to address the fault as soon as possible and monitor compartment temperatures with an independent thermometer in the meantime.
Will resetting my Daewoo refrigerator clear the R2 error code?
A power reset may temporarily clear the error display, but the code will return if the underlying fault in the R2 sensor circuit is still present. The sensor or wiring issue must be physically diagnosed and repaired before the error will stay cleared. Resetting without repairing does not restore the disabled low cooling prevention function.
How much does it cost to repair the R2 error on a Daewoo refrigerator?
Repair costs vary depending on the root cause. Replacement temperature sensors are generally inexpensive, typically in the range of $10 to $40 for the part alone. If a wiring harness or control board replacement is needed, costs can rise to $80 to $250 or more including labor. A professional diagnostic visit typically adds $60 to $120 before any parts are factored in.

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