LG · Dishwasher Serious
CE — Motor / communication error
On many LG dishwashers CE is grouped with LE and means the main board has lost feedback from the wash motor; on some recent models CE means the main PCB and sub PCB have lost communication.
- Keep using it?
- Limited use only
- DIY difficulty
- Moderate
- Verified against
- lg.com ↗
How to fix it
- Cycle power at the breaker for 2 minutes.
- Open the door, remove the inner door trim screws, and inspect the UI ribbon connector.
- Reseat both ends of the communication cable; look for corrosion or melted pins.
- If CE returns, swap or replace the UI (sub) PCB first — it is the cheaper part.
- If CE persists with a known-good UI, replace the main PCB.
- Verify ground continuity to the dishwasher chassis at the power cord.
- Confirm the unit is on a dedicated 15 A circuit per LG spec.
Why it happens
Typical signs: CE shown shortly after start · Cycle aborts · No wash sound · Display freezes or flickers
- Loose ribbon / harness between PCBs Communication cable between main and sub board unseated.
- Motor feedback fault Same root cause as LE on shared firmware.
- Moisture in a control connector Steam intrusion at the door latch or top trim corrodes pins.
- Failed sub PCB (display/UI board) User-interface board no longer responds to main PCB.
- Failed main PCB Driver IC failure preventing motor command.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More LG dishwasher codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.