When it comes to keeping our food fresh and drinks cool, refrigerators are an essential appliance in our homes.

But what happens when your LG refrigerator control board starts to blink 3 times?

This error is a common issue that many LG refrigerator owners face, and it can be quite frustrating.

In this blog, we’ll explore the reasons why this error occurs and provide some tips on how to troubleshoot and fix it.

why an lg refrigerator control board to blink 3 times

Why Does the LG Refrigerator Control Board Blink 3 Times?

LG refrigerators are widely popular for their sleek design, energy efficiency, and advanced features. Some users may encounter a problem with the control board blinking three times.

Let’s explore the possible reasons for this issue.

Low Voltage

One of the common reasons for the control board blinking three times is low voltage. The voltage supplied to the refrigerator may be too low, causing the control board to malfunction.

To fix this issue, check the voltage supply to the refrigerator and ensure it meets the recommended range.

Faulty Temperature Sensor

Another reason for the control board blinking three times could be a faulty temperature sensor.

The temperature sensor is responsible for detecting the temperature inside the refrigerator and sending signals to the control board.

If the sensor is not working correctly, it can cause the control board to blink three times. You need to replace the temperature sensor.

Loose Wiring Connections

Loose wiring connections can also cause the control board to blink three times. The wiring connections may have become loose over time or during transportation.

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You will need to check the wiring connections and ensure they are tight and secure.

Defective Control Board

A defective control board is another possible reason for the three-time blinking issue.

If none of the above solutions work, it may indicate a problem with the control board itself.

A technician may need to examine the refrigerator and replace the control board if necessary.

Fixing LG Refrigerator Control Board Blinking 3 Times Error

fixing lg refrigerator control board blinking 3 times error

If your LG refrigerator’s control board is blinking 3 times, it’s indicating a fault in the communication between the main control board and the display panel.

Here’s how you can fix it.

Check the Wiring

Check the wiring connections between the main control board and the display panel. Make sure that all the connections are secure and tight.

If any wire is loose or disconnected, reconnect it and try to restart the refrigerator.

Reset the Control Board

If the wiring connections are fine, try resetting the control board. Remove the plug from the power outlet and wait for a few minutes.

Then plug it back and turn it on. This may reset the control board and fix the blinking error.

Replace the Display Panel

If the above steps don’t work, the issue may be with the display panel. You may need to replace it.

Before replacing the display panel, make sure to check the wiring connections again.

Replace the Main Control Board

If none of the above steps fix the issue, the problem may be with the main control board. You’ll need to replace the main control board or hire a professional to do this.

Preventive Maintenance for LG Refrigerator Control Board

preventive maintenance for lg refrigerator control board

Here are some preventive maintenance tips to keep your control board in good working condition.

Clean the Refrigerator Coils

The refrigerator coils located at the back or bottom of the refrigerator can accumulate dust and debris over time.

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This can cause the control board to overheat and malfunction. Clean the coils every 6 months with a brush or vacuum cleaner to prevent this from happening.

Keep the Refrigerator Door Seals Clean

The door seals prevent warm air from entering the refrigerator, causing the control board to work harder.

Regularly clean the door seals with a damp cloth and mild detergent to keep them in good condition.

Ensure a Proper Ventilation

The control board needs proper ventilation to work efficiently. Make sure it is placed in a well-ventilated area with enough space around it for air to circulate.

Avoid Overloading the Refrigerator

Overloading the refrigerator can cause it to work harder, putting more strain on the control board.

Avoid overloading the refrigerator by not packing it too full and ensuring proper circulation of air inside.

Use a Surge Protector

Power surges can damage the control board and other components of the refrigerator.

Use a surge protector to protect your refrigerator from voltage spikes and power surges.

Importance of Control Board in Refrigerator

importance of control board in refrigerator

The control board is a vital component in a refrigerator that ensures the proper functioning of the appliance. And there is some potential importance.

Regulates Temperature

The control board is responsible for regulating the temperature inside the refrigerator.

It constantly monitors the temperature and adjusts the cooling system accordingly. This ensures that the food stored inside the refrigerator stays fresh and doesn’t spoil.

Manages Defrost Cycle

The control board also manages the defrost cycle of the refrigerator. It initiates the defrost cycle when the evaporator coils get covered with frost.

The defrost cycle helps in removing the frost and prevents the refrigerator from becoming inefficient.

Controls Power Supply

The control board controls the power supply to the compressor and other components of the refrigerator.

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It ensures that the compressor runs efficiently and doesn’t consume more electricity than necessary.

This helps in reducing the energy consumption of the refrigerator.

Monitors Faults

The control board monitors the various components of the refrigerator and detects any faults or malfunctions.

It alerts the user through error codes or alarms. This helps in identifying the problem and getting it fixed before it causes any damage to the appliance.


What Causes The Communication Error Between The Main Control Board And The Display Panel?

The wiring connections between the main control board and the display panel can lose or disconnect, due to some fault in the display panel.

How Can I Fix The Communication Error?

You can fix the communication error by checking and tightening the wiring connections, resetting the control board, replacing the display panel, or replacing the main control board.

What Should I Do If Tightening The Wiring Connections And Resetting The Control Board Does Not Fix The Issue?

If tightening the wiring connections and resetting the control board does not fix the issue, you may need to replace the display panel or main control board. Seek the help of a professional if you are unsure how to do this.


A blinking control board on an LG refrigerator can be an indicator of a communication error between the main control board and the display panel.

This issue can be caused by loose or disconnected wiring connections, a faulty display panel, or a malfunctioning main control board.

Regular maintenance and proper usage of the refrigerator can help prevent this issue from occurring, but if it does, seek the help of a professional to properly diagnose and fix the issue.

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