LG · Dishwasher Critical
E1 — Leak detected (newer display label)
E1 is the newer-firmware label for the same anti-flood/leak event as AE: water reached the base pan and tripped the float switch. The unit blocks fill and runs the drain pump until cleared.
- Keep using it?
- No — service first
- DIY difficulty
- Moderate
- Verified against
- lg.com ↗
How to fix it
- Tip the unit back to empty the base pan onto towels and let it air-dry overnight.
- While accessible, inspect all clamps, the inlet valve body, sump grommets, and door gasket for leaks.
- Switch to dishwasher-only detergent and use the recommended dose.
- Restore power; if E1 immediately returns with a dry pan, the float sensor is faulty.
- Replace the leak sensor / float switch at the base.
- If a hose or inlet valve is the source, replace that component.
- Run a short cycle and watch for new wetness before reinstalling the kick plate.
Why it happens
Typical signs: E1 shown on display · Continuous drain pump operation · Won't start any cycle · Water on floor under the dishwasher
- Excess suds from improper detergent Foam migrates past the door gasket and pools in the base pan.
- Pinched / aged door gasket Compression set or food debris on seal lets steam and water escape.
- Loose hose clamp at sump or drain Vibration loosens factory clamps over time.
- Inlet valve internal leak Cracked plastic body weeps onto the base when pressurized.
- Sensor stuck wet from prior event Drain pan not fully dried — float remains raised after the leak source was fixed.
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.