LG Dishwasher CE Error Code: Motor Circuit or PCB Fault... | appliancefaults.com

Technical Background:

The CE error code in LG dishwashers typically indicates a communication or electrical fault within the drain motor circuit or the main control board (PCB). The MCU on the control board monitors the current draw and operation of the drain motor. If the current is outside the expected range or communication is lost, the CE error is triggered.

Symptoms:

The dishwasher displays a 'CE' error code on the control panel. The dishwasher may not drain properly, leaving water in the bottom. The drain pump may not be running, or it may be making unusual noises.

Possible Causes:

Faulty drain motor
Blocked drain pump impeller
Wiring harness issues between the motor and control board
Defective main control board (PCB)
Overloading the dishwasher (excessive suds)
Stuck or failing drain float switch

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Access the drain pump, usually located at the bottom of the dishwasher. Remove the lower access panel with a 1/4-inch nut driver.
3

Inspect the drain pump for any visible obstructions. Remove any debris.
4

Check the wiring harness connecting the drain pump to the control board for damage or loose connections. Use a multimeter to check continuity of the wires.
5

Using a multimeter, check the voltage at the drain pump connector during the drain cycle. You should see approximately 120V AC.
6

If voltage is present but the pump isn't running, the pump is likely defective. Replace the drain pump.
7

If no voltage is present, the control board may be faulty. Consider replacing the control board. Ensure it is the correct replacement for the model.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Use Lock Out Tag Out (LOTO) procedures to ensure the breaker remains off. Some components may carry 120V AC even when the dishwasher is off; exercise caution.

Prevention:

Avoid overloading the dishwasher and use the recommended amount of dishwasher detergent. Regularly clean the drain screen and inspect the drain pump area for debris.

Expert Tip:

After replacing the control board, you may need to perform a service reset or calibration. Consult the service manual for your specific LG dishwasher model for the correct procedure. This often involves entering a service mode sequence by pressing a specific combination of buttons.

Frequently Asked Questions

•How do I access the service mode on my LG dishwasher?

The service mode access varies by model. Typically, it involves pressing a sequence of buttons (e.g., 'Energy Saver' + 'Delay Start' for 3 seconds). Consult your service manual for the specific button combination for your model.

•Where is the drain float switch located and how do I test it?

The drain float switch is usually located in the base of the dishwasher, near the drain pump. To test it, visually inspect for debris. Use a multimeter to check for continuity when the float is raised and lowered. It should show continuity when raised.

•If the control board is faulty, does it need to be programmed?

In some cases, yes. Some LG control boards require programming or calibration after installation to match your specific dishwasher model. Check the instructions that come with the replacement control board.

LG Dishwasher CE Error Code: Motor Circuit or PCB Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the service mode on my LG dishwasher?

•Where is the drain float switch located and how do I test it?

•If the control board is faulty, does it need to be programmed?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: