Lg Refrigerator Error Er C1

⚡ Quick Answer: The LG refrigerator error code Er C1 indicates a communication failure between the internal control boards, such as the main PCB and the display/UI PC... ✅ DIY Fixable

What Does Error Er C1 Mean?

The LG refrigerator error code Er C1 indicates a communication failure between the internal control boards, such as the main PCB and the display/UI PCB. This error is typically marked by the display showing 'C1' or 'Er C1', and it may result in the refrigerator not operating normally or experiencing interruptions in its functions. Users may also notice unusual noises from the appliance. Addressing this error often involves checking for loose or damaged wiring and performing a power cycle on the refrigerator.

Common Symptoms:

  • Error code “C1” or “Er C1” displayed on control panel
  • Fridge may not operate normally when error is present
  • Possible interruption in normal functions or lockout of some operations

Possible Causes

  • Communication failure between control modules (main PCB and display/UI PCB) (medium)
  • Loose or damaged wiring harness/connectors between PCBs (medium)

How to Fix Error Er C1

DIY Fix Basic user checks for C1 communication error

  1. Power cycle the refrigerator by unplugging it for at least 5 minutes and then plugging it back in.
  2. Ensure refrigerator doors are properly closed and that there have been no recent power interruptions.
  3. Visually inspect the power cord and accessible wiring (e.g., harness at the hinge area) for obvious damage or loose connections.

Technician Only Technician diagnosis and repair for communication error

  1. Open control panel and inspect connector harnesses between the main PCB and user interface/display PCB for looseness or damage.
  2. Use diagnostic tools to confirm communication chain between control boards.
  3. Replace or repair damaged wiring harnesses or faulty PCBs (main control board or UI/display board) as needed.

Parts needed: Control board (main PCB), User interface/display PCB, Wiring harness/connectors

🛑 When to Call a Pro:
  • If basic user checks (power cycle and visual inspection) do not clear the error
  • If any internal wiring or PCB damage is suspected
  • If the refrigerator does not return to normal operation after simple resets

Technical Specifications

wattage 200W
component Compressor
resistance 3-5 ohms
part_number LG 4681JA2009D
voltage_rating 120V AC

Common Questions

What does Er C1 error mean on LG refrigerator?

Er C1 indicates a communication failure between control boards, causing operational disruptions.

Can I fix LG refrigerator Er C1 error myself?

Yes, you can attempt basic checks like power cycling the fridge and inspecting wiring for issues.

How much does it cost to fix Er C1 error?

Repair costs range from ¥15,000 to ¥60,000, depending on parts and location.

When should I call a technician for Er C1?

Call a technician if basic checks don't resolve the error or if you suspect internal damage.

Data last verified: 2026-01-10

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