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Error code reference
LG Refrigerator Error Code LED 1 time
AD-offset Error on compressor PCB
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What the LED 1 time error code actually means
Your LG refrigerator has detected a problem with the electronic board that controls the compressor. The board is not reading the compressor's electrical signals correctly, which prevents it from running the compressor safely. This usually requires the control board to be replaced by a technician.
Diagnostic procedure
The full LED 1 time procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
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1
First diagnostic step
Check normal operation after power reset; if same error occurs, replace PCB.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of LED 1 time
Ranked by how often they cause this code
- 1Failed compressor PCB
- 2Transient power disturbance
- 3Loose or corroded wiring connections to the compressor PCB
- 4Compressor winding or motor fault feeding back into sensing circuit
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Questions people ask about LED 1 time
What does LED 1 time mean on a LG refrigerator?
The LED 1 time error indicates an AD-offset error on the compressor PCB, meaning the board's motor voltage or current sensing circuit has detected a problem. Specifically, the reference voltage at point CC310 on the compressor control board has fallen outside the required 2.2 to 2.8V range. The board flags this condition to prevent running the compressor on faulty sensor data. In most cases, the compressor PCB will need to be replaced.
How do I fix the LED 1 time error on my LG refrigerator?
Start by performing a full power reset by unplugging the unit for several minutes. If the error does not return, no further action may be needed. If the error reappears, the compressor PCB requires replacement, as the internal sensing circuit responsible for monitoring CC310 reference voltage is faulty. A qualified technician should handle PCB replacement to ensure correct installation and safe handling of the inverter compressor system.
How much does it cost to fix a LED 1 time error on an LG refrigerator?
Repair costs vary depending on the model, parts availability, and labor rates in your area. A replacement compressor PCB for an LG refrigerator typically ranges from around 80 to 250 dollars for the part alone. Adding professional labor, total repair costs generally fall in the range of 150 to 400 dollars. Getting a diagnostic appointment from an authorized technician will provide a more accurate estimate for your specific model.
Will resetting the refrigerator clear the LED 1 time error?
A power reset is always the first recommended step because a transient electrical disturbance can sometimes cause a one-time AD-offset fault. Unplug the refrigerator for a few minutes, then restore power and monitor for recurrence. If the LED 1 time error returns after the reset, the compressor PCB has a persistent fault and will need to be replaced.
Is it safe to keep using my LG refrigerator when the LED 1 time error is active?
When this error is active, the compressor PCB has detected a sensing defect and may restrict or shut down compressor operation to protect the system. This means the refrigerator may not be maintaining proper temperatures, putting stored food at risk. It is not advisable to rely on the unit for food storage until the fault is diagnosed and resolved.
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