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Error code reference

LG Refrigerator Error Code r2 E

Refrigerator sensor 2 error

LG codesLG refrigerator codes

Refrigerator sensor 2 error – the second refrigerator temperature sensor has a short, open, or out-of-range resistance.

First step from the service manual

Check for a loose connection at CON6, then measure resistance at Pin7 to Pin8 of CON6.

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

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What r2 E means on a LG refrigerator

The r2 E error code on an LG refrigerator indicates a fault with the second refrigerator compartment temperature sensor. This sensor is a thermistor, meaning its resistance value changes predictably with temperature. The control board monitors this resistance continuously. When the board detects a short circuit (resistance too low), an open circuit (resistance too high or no continuity), or a value that falls outside the expected operating range, it triggers the r2 E code and may disable normal cooling operations to prevent damage.

The sensor connects to the main control board through connector CON6, with the sensor signal running across Pin 7 and Pin 8 of that connector. The first diagnostic step is to inspect CON6 for any loose, corroded, or damaged terminals. A poor connection at this point can mimic a failed sensor by introducing erratic resistance readings or breaking the circuit entirely. After confirming the connector is secure, measure resistance across Pin 7 and Pin 8 to determine whether the thermistor itself is within specification.

Common root causes include a thermistor that has drifted out of spec due to age or moisture exposure, a wiring harness that has been pinched or chafed, and connector corrosion from condensation buildup inside the refrigerator cabinet. In rarer cases, the main control board itself may be misreading an otherwise functional sensor due to a board-level fault. Systematic testing starting at the connector and working back toward the sensor and then the board will isolate the failed component.

Source: manufacturer service documentation.

Common causes of r2 E

  1. 01

    Loose or corroded connection at CON6

    Wiring / connection

    The connector at CON6 can work loose over time or develop corrosion from condensation, causing intermittent or complete loss of signal from the sensor. Inspect Pin 7 and Pin 8 terminals for corrosion, bent pins, or a connector that is not fully seated.

  2. 02

    Failed refrigerator thermistor (sensor 2)

    Part replacement

    The thermistor itself can fail due to age, moisture intrusion, or physical damage, causing its resistance to read as shorted, open, or out of range. Measuring resistance across Pin 7 to Pin 8 of CON6 will confirm whether the sensor is out of specification.

  3. 03

    Damaged wiring harness

    Part replacement

    The wiring between the thermistor and CON6 can be pinched by shelving, caught in a door hinge, or chafed against a sharp cabinet edge, breaking continuity or causing a short. Inspect the full length of the harness for visible damage, kinks, or worn insulation.

  4. 04

    Moisture or ice buildup around the sensor

    Wiring / connection

    Excessive ice accumulation in the refrigerator compartment can encase the thermistor and distort its readings or physically damage its leads. If frost buildup is visible near the sensor location, a manual defrost cycle should be performed before retesting.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor and all wiring test within spec but the error persists, the main control board may be incorrectly interpreting the resistance signal due to a board-level component failure. This is the least common cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about r2 E

What does r2 E mean on a LG refrigerator?
The r2 E code means the second refrigerator compartment temperature sensor has a fault. The control board has detected that the sensor's resistance is shorted, open, or outside the acceptable range. This sensor is critical for maintaining proper cooling in the refrigerator section. The issue may lie in the sensor itself, the wiring harness, or the connector at CON6.
Can I fix the r2 E error myself?
A knowledgeable DIYer can start by checking the connector at CON6 for loose or corroded terminals, since a poor connection is the most common cause. If the connector looks good, measuring resistance at Pin 7 to Pin 8 of CON6 with a multimeter will confirm whether the sensor has failed. Replacing a thermistor is a straightforward repair for someone comfortable with basic appliance work, but diagnosing a wiring or control board issue may require more technical skill.
Is it safe to keep using my refrigerator while the r2 E code is active?
It is not advisable to rely on the refrigerator for extended food storage while this error is active. Because the sensor monitors compartment temperature, a failed sensor means the control board may not regulate cooling accurately. Food safety can be compromised if the fridge runs too warm without triggering an alert. Address the fault as soon as possible to avoid spoilage.
Will resetting my LG refrigerator clear the r2 E error?
A reset may temporarily clear the code from the display, but the error will return if the underlying fault has not been fixed. Resetting the refrigerator does not repair a failed sensor, damaged wiring, or a loose connector. Use a reset only to confirm whether a transient issue (such as a momentarily unseated connector) was the cause, and monitor closely afterward to see if the code returns.
How much does it cost to repair an r2 E error on an LG refrigerator?
If only the thermistor needs replacement, parts typically range from $15 to $50, and a professional repair call adds labor costs on top of that, generally bringing the total to somewhere between $100 and $250 depending on your area. If the main control board is at fault, parts alone can range from $150 to $350 or more, making the total repair cost considerably higher. Getting a diagnostic visit from a qualified technician before ordering parts is the best way to avoid unnecessary expense.

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