LG · Dishwasher

CE

Communication Error

Severity

High

Seeing CE on your LG Dishwasher display means the appliance self-diagnostic detected "Communication Error". Before calling a technician, work through the steps in this guide — the fix is often simpler than you think.

Owner's Summary

The two computer boards in your LG dishwasher have lost communication. A 10-minute power cycle resolves this in many cases when it was caused by a voltage spike. If CE returns every time, a board will need replacement.

Symptoms

LG dishwasher all buttons flashing, CE on display, machine unresponsive

Common Causes

Power surge damaging communication line between boards
Loose wiring harness between main PCB and display board
Failed main PCB
Failed display or control board

How to Fix

1 Unplug dishwasher for 10 minutes and reconnect power
2 Inspect and reseat all wiring harness connectors between boards
3 Check for burn marks or damaged components on PCBs
4 Replace main PCB if error persists
5 Replace display board if main PCB tests good

Tools You'll Need

Electrical Contact Cleaner Flashlight

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

LG dishwashers use serial communication between the main PCB and the display/control board. CE is generated when the main board does not receive valid acknowledgment packets within the communication timeout. Three consecutive failures cause CE to be displayed and all operations halted.

Is It Safe to Keep Using?

Safe to leave off. Do not run cycles with CE active.

Technician's Pro Tip

Vibration from the wash cycle can cause harness connectors to back out gradually. On LG dishwashers, the harness runs along the door inner panel — pull the door inner panel and inspect the full harness for loose connectors and chafing damage.

Related Codes

OE — LG Washing Machine

Drain Error — Outlet Error

High

IE — LG Washing Machine

Inlet Error — Water Not Filling

High

LE — LG Washing Machine

Motor Error — Locked Motor

High

Frequently Asked Questions

What does error code CE mean on a LG Dishwasher?

Code CE on a LG Dishwasher indicates "Communication Error." In practice, the most common trigger is power surge damaging communication line between boards. Severity is rated high, and typical repair costs range from $0 to $300.

Can I fix CE myself, or do I need a technician?

Many cases of CE can be resolved without a technician. The first step to try: unplug dishwasher for 10 minutes and reconnect power. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code CE showing?

Safe to leave off. Do not run cycles with CE active.

How much does it cost to repair CE on a LG Dishwasher?

Repair costs for code CE typically range from $0 to $300. Connector reseat: $0; Main PCB: $80–$300; Display board: $40–$120. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$0 – $300

Connector reseat: $0; Main PCB: $80–$300; Display board: $40–$120