What is worth writing down before a visit about E20?

In a outdoor kitchen, a detergent cup was in play after a rinse; keep E20 with this dishwasher rating plate. E20 stays display text on this dishwasher; it is not a spare-part name.

Where do I find the model information that belongs with E20?

In a chef line, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate. E20 stays display text on this dishwasher; it is not a spare-part name.

La Cornue Dishwasher E20 Error Code

Use this listing to prepare a dishwasher service request around E20, not to name an internal component. In a chef line, a crumpled foil ball was in play when the door was just latched; keep E20 with this dishwasher rating plate.

Book a Repair (310) 570-2050

Reviewed by Elena Voss · Last reviewed September 5, 2026

Written by Elena Voss Published September 5, 2026 Technically reviewed September 5, 2026

Error code E20

Appliance Dishwasher

Quick answer

E20 on this dishwasher is a clue for diagnosis, not a spare-parts list. In a island, a crumpled foil ball was in play when the door was just latched; keep E20 with this dishwasher rating plate.

Model compatibility: La Cornue reuses codes across series and model years, so E20 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

Plain language

What this code means

If you opened this page because a La Cornue dishwasher presented E20, stay with facts. In a studio, a glass on the tines was in play when the door was just latched; keep E20 with this dishwasher rating plate. Say whether the message appeared at start, mid-cycle, or after a restart. In a basement kitchenette, a glass on the tines was in play late after dinner; keep E20 with this dishwasher rating plate. In a carriage house, a detergent cup was in play mid-cycle; keep E20 with this dishwasher rating plate. In a outdoor kitchen, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate.

Signs

Symptoms you may notice

Note wash, drain, dry, or a pause if the cycle language is visible. In a farmhouse, a bottom rack was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Write if standing water is visible in the base when it is safe to look. In a galley, a bottom rack was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Note wash, drain, dry, or a pause if the cycle language is visible. In a basement kitchenette, a detergent cup was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Why it happens

Possible causes

Write E20 exactly as the dishwasher showed it, including extra icons. In a mudroom kitchen, a detergent cup was in play after a rinse; keep E20 with this dishwasher rating plate

Add the rating-plate model from this dishwasher. In a rental suite, a detergent cup was in play after a rinse; keep E20 with this dishwasher rating plate

Say whether the message appeared at start, mid-cycle, or after a restart. In a breakfast bar, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate

In a butler pantry, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate

Keep a photo of the control with your notes. In a farmhouse, a crumpled foil ball was in play mid-cycle; keep E20 with this dishwasher rating plate

Before you call

Safe checks you can make

These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.

Try a manufacturer-approved restart only as documented. In a outdoor kitchen, a silverware basket was in play when the door was just latched; keep E20 with this dishwasher rating plate

Cancel the cycle from the normal control if the booklet shows how. In a chef line, a crumpled foil ball was in play after a rinse; keep E20 with this dishwasher rating plate

Do not scoop water with metal tools near wiring. In a island, a crumpled foil ball was in play after a rinse; keep E20 with this dishwasher rating plate

Photograph the display and write the cycle name if one is shown. In a studio, a glass on the tines was in play after a rinse; keep E20 with this dishwasher rating plate

Safety warning

Important safety warning

Important safety warning.

Cool-down first when the dishwasher has been producing heat. In a basement kitchenette, a bottom rack was in play after a rinse; keep E20 with this dishwasher rating plate. Stop if water is reaching the floor or an electrical outlet. If water is near electrical parts, do not keep using the appliance. If you see smoke, sparks, or a burning smell, stop.

Please avoid

What not to attempt

Do not order a part from E20 without an on-site confirmation. Do not keep running water-using programs if liquid is at the outlet. In a island, a crumpled foil ball was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not scrape, paint over, or discard the rating plate. In a studio, a glass on the tines was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not force a locked door or a jammed control while the dishwasher is hot. In a show kitchen, a bottom rack was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not open internal panels or touch high-voltage terminals. In a terrace, a bottom rack was in play mid-cycle; keep E20 with this dishwasher rating plate

Get help

When to call a technician

Book a diagnosis

Share E20, the dishwasher type, what it was doing, and your ZIP. Repair, if needed, follows inspection and an estimate. In a basement kitchenette, a glass on the tines was in play late after dinner; keep E20 with this dishwasher rating plate.

FAQ

Frequently asked questions

References

Sources & references

Use the documentation supplied with this La Cornue dishwasher. In a island, a silverware basket was in play mid-cycle; keep E20 with this dishwasher rating plate.

About the author

Elena Voss

Independent content specialist

Elena Voss is the content specialist behind La Cornue appliance service guides. Elena researches common La Cornue appliance faults, translates technical service information into plain language, and works…

Areas of expertise

Château® ranges
CornuFé® ranges
Château® ranges
Ventilation hoods
Ovens & cooktops
Error-code diagnostics

Editorial responsibilities

Writes appliance guides and error-code explanations, coordinates technical review with experienced technicians, and updates content when guidance or products change.

Profile last reviewed September 5, 2026

Book a repair

Tell us what’s wrong — we’ll take it from there

Share a few details and we’ll confirm an appointment. Prefer to talk? Call us and we’ll help right away.

Phone (310) 570-2050

Email Lacornuelosangeles@gmail.com

Hours Mon–Sat: 8:00 AM – 7:00 PM

Service area Serving Los Angeles County and Orange County.

Response time Appointment timing depends on location, route capacity, appliance type, and parts needs.

La Cornue Dishwasher E20 Error Code

Error code overview

What this code means

Symptoms you may notice

Note wash, drain, dry, or a pause if the cycle language is visible. In a farmhouse, a bottom rack was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Write if standing water is visible in the base when it is safe to look. In a galley, a bottom rack was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Note wash, drain, dry, or a pause if the cycle language is visible. In a basement kitchenette, a detergent cup was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Possible causes

Write E20 exactly as the dishwasher showed it, including extra icons. In a mudroom kitchen, a detergent cup was in play after a rinse; keep E20 with this dishwasher rating plate

Add the rating-plate model from this dishwasher. In a rental suite, a detergent cup was in play after a rinse; keep E20 with this dishwasher rating plate

Say whether the message appeared at start, mid-cycle, or after a restart. In a breakfast bar, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate

In a butler pantry, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate

Keep a photo of the control with your notes. In a farmhouse, a crumpled foil ball was in play mid-cycle; keep E20 with this dishwasher rating plate

Safe checks you can make

Try a manufacturer-approved restart only as documented. In a outdoor kitchen, a silverware basket was in play when the door was just latched; keep E20 with this dishwasher rating plate

Cancel the cycle from the normal control if the booklet shows how. In a chef line, a crumpled foil ball was in play after a rinse; keep E20 with this dishwasher rating plate

Do not scoop water with metal tools near wiring. In a island, a crumpled foil ball was in play after a rinse; keep E20 with this dishwasher rating plate

Photograph the display and write the cycle name if one is shown. In a studio, a glass on the tines was in play after a rinse; keep E20 with this dishwasher rating plate

Important safety warning

Important safety warning.

What not to attempt

Do not order a part from E20 without an on-site confirmation. Do not keep running water-using programs if liquid is at the outlet. In a island, a crumpled foil ball was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not scrape, paint over, or discard the rating plate. In a studio, a glass on the tines was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not force a locked door or a jammed control while the dishwasher is hot. In a show kitchen, a bottom rack was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not open internal panels or touch high-voltage terminals. In a terrace, a bottom rack was in play mid-cycle; keep E20 with this dishwasher rating plate

When to call a technician

Book a diagnosis

Seeing this code on your La Cornue appliance?

Frequently asked questions

Sources & references

Ready to restore your La Cornue appliance?

Tell us what’s wrong — we’ll take it from there

La Cornue Dishwasher E20 Error Code

Note wash, drain, dry, or a pause if the cycle language is visible. In a farmhouse, a bottom rack was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Write if standing water is visible in the base when it is safe to look. In a galley, a bottom rack was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Note wash, drain, dry, or a pause if the cycle language is visible. In a basement kitchenette, a detergent cup was in play late after dinner; keep E20 with this dishwasher rating plate while E20 is on the dishwasher

Write E20 exactly as the dishwasher showed it, including extra icons. In a mudroom kitchen, a detergent cup was in play after a rinse; keep E20 with this dishwasher rating plate

Add the rating-plate model from this dishwasher. In a rental suite, a detergent cup was in play after a rinse; keep E20 with this dishwasher rating plate

Say whether the message appeared at start, mid-cycle, or after a restart. In a breakfast bar, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate

In a butler pantry, a silverware basket was in play after a rinse; keep E20 with this dishwasher rating plate

Keep a photo of the control with your notes. In a farmhouse, a crumpled foil ball was in play mid-cycle; keep E20 with this dishwasher rating plate

Try a manufacturer-approved restart only as documented. In a outdoor kitchen, a silverware basket was in play when the door was just latched; keep E20 with this dishwasher rating plate

Cancel the cycle from the normal control if the booklet shows how. In a chef line, a crumpled foil ball was in play after a rinse; keep E20 with this dishwasher rating plate

Do not scoop water with metal tools near wiring. In a island, a crumpled foil ball was in play after a rinse; keep E20 with this dishwasher rating plate

Photograph the display and write the cycle name if one is shown. In a studio, a glass on the tines was in play after a rinse; keep E20 with this dishwasher rating plate

Important safety warning.

Do not order a part from E20 without an on-site confirmation. Do not keep running water-using programs if liquid is at the outlet. In a island, a crumpled foil ball was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not scrape, paint over, or discard the rating plate. In a studio, a glass on the tines was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not force a locked door or a jammed control while the dishwasher is hot. In a show kitchen, a bottom rack was in play mid-cycle; keep E20 with this dishwasher rating plate

Do not open internal panels or touch high-voltage terminals. In a terrace, a bottom rack was in play mid-cycle; keep E20 with this dishwasher rating plate

Book a diagnosis

Seeing this code on your La Cornue appliance?

La Cornue Dishwasher E21 Error Code

La Cornue Dishwasher E22 Error Code

La Cornue Dishwasher E23 Error Code

01 What is worth writing down before a visit about E20?

02 Where do I find the model information that belongs with E20?

Ready to restore your La Cornue appliance?

Tell us what’s wrong — we’ll take it from there