Can a restart permanently clear E21 on this dishwasher?

In a tasting kitchen, a glass on the tines was in play mid-cycle; keep E21 with this dishwasher rating plate. E21 stays display text on this dishwasher; it is not a spare-part name.

Is E21 enough information to order a part?

In a courtyard, a glass on the tines was in play mid-cycle; keep E21 with this dishwasher rating plate. E21 stays display text on this dishwasher; it is not a spare-part name.

How should I describe E21 if the display later goes blank?

In a rooftop kitchen, a bottom rack was in play mid-cycle; keep E21 with this dishwasher rating plate. E21 stays display text on this dishwasher; it is not a spare-part name.

La Cornue Dishwasher E21 Error Code

When E21 appears on a La Cornue dishwasher, the useful next step is documentation you can hand a technician. In a ADU, a crumpled foil ball was in play mid-cycle; keep E21 with this dishwasher rating plate.

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Reviewed by Elena Voss · Last reviewed September 5, 2026

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

Error code E21

Appliance Dishwasher

Quick answer

La Cornue dishwasher / E21: what to record and when to stop using the appliance. In a pool house, a glass on the tines was in play mid-cycle; keep E21 with this dishwasher rating plate.

Model compatibility: La Cornue reuses codes across series and model years, so E21 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

Short codes like E21 are reused. In a guest house, a glass on the tines was in play mid-cycle; keep E21 with this dishwasher rating plate. On this dishwasher, capture the display and the plate. Note wash, drain, dry, or a pause if the cycle language is visible. In a rental suite, a glass on the tines was in play after a rinse; keep E21 with this dishwasher rating plate. In a studio, a detergent cup was in play when the door was just latched; keep E21 with this dishwasher rating plate. In a rooftop kitchen, a crumpled foil ball was in play when the door was just latched; keep E21 with this dishwasher rating plate.

Signs

Symptoms you may notice

Record whether the door was latched and whether you heard water moving. In a butler pantry, a silverware basket was in play after a rinse; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Say whether the message appeared at start, mid-cycle, or after a restart. In a farmhouse, a crumpled foil ball was in play mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Record whether the door was latched and whether you heard water moving. In a galley, a crumpled foil ball was in play mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

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 mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Why it happens

Possible causes

Write E21 exactly as the dishwasher showed it, including extra icons. In a pool cabana, a crumpled foil ball was in play when the door was just latched; keep E21 with this dishwasher rating plate

Add the rating-plate model from this dishwasher. In a mudroom kitchen, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Note wash, drain, dry, or a pause if the cycle language is visible. In a rental suite, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

In a breakfast bar, a bottom rack was in play when the door was just latched; keep E21 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.

Cancel the cycle from the normal control if the booklet shows how. In a terrace, a crumpled foil ball was in play when the door was just latched; keep E21 with this dishwasher rating plate

Do not scoop water with metal tools near wiring. In a in-law kitchen, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Photograph the display and write the cycle name if one is shown. In a penthouse, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Safety warning

Important safety warning

Important safety warning.

If the outlet is wet, skip unplugging and isolate power another safe way or wait for help. In a terrace, a bottom rack was in play after a rinse; keep E21 with this dishwasher rating plate. Do not keep repeating a cycle that immediately fails. 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 scrape, paint over, or discard the rating plate. Do not keep running water-using programs if liquid is at the outlet. In a pool cabana, a bottom rack was in play after a rinse; keep E21 with this dishwasher rating plate

Do not force a locked door or a jammed control while the dishwasher is hot. In a mudroom kitchen, a detergent cup was in play after a rinse; keep E21 with this dishwasher rating plate

Do not open internal panels or touch high-voltage terminals. In a rental suite, a detergent cup was in play after a rinse; keep E21 with this dishwasher rating plate

Get help

When to call a technician

Book a diagnosis

A diagnosis visit is the right next step if E21 persists, if you cannot safely reach the outlet, or if the dishwasher behaves differently after the message. In a rental suite, a glass on the tines was in play after a rinse; keep E21 with this dishwasher rating plate.

FAQ

Frequently asked questions

References

Sources & references

Display messages for a dishwasher belong in the booklet that shipped with the appliance. In a pool house, a detergent cup was in play late after dinner; keep E21 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

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La Cornue Dishwasher E21 Error Code

Error code overview

What this code means

Symptoms you may notice

Record whether the door was latched and whether you heard water moving. In a butler pantry, a silverware basket was in play after a rinse; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Say whether the message appeared at start, mid-cycle, or after a restart. In a farmhouse, a crumpled foil ball was in play mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Record whether the door was latched and whether you heard water moving. In a galley, a crumpled foil ball was in play mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

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 mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Possible causes

Write E21 exactly as the dishwasher showed it, including extra icons. In a pool cabana, a crumpled foil ball was in play when the door was just latched; keep E21 with this dishwasher rating plate

Add the rating-plate model from this dishwasher. In a mudroom kitchen, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Note wash, drain, dry, or a pause if the cycle language is visible. In a rental suite, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

In a breakfast bar, a bottom rack was in play when the door was just latched; keep E21 with this dishwasher rating plate

Safe checks you can make

Cancel the cycle from the normal control if the booklet shows how. In a terrace, a crumpled foil ball was in play when the door was just latched; keep E21 with this dishwasher rating plate

Do not scoop water with metal tools near wiring. In a in-law kitchen, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Photograph the display and write the cycle name if one is shown. In a penthouse, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Important safety warning

Important safety warning.

What not to attempt

Do not scrape, paint over, or discard the rating plate. Do not keep running water-using programs if liquid is at the outlet. In a pool cabana, a bottom rack was in play after a rinse; keep E21 with this dishwasher rating plate

Do not force a locked door or a jammed control while the dishwasher is hot. In a mudroom kitchen, a detergent cup was in play after a rinse; keep E21 with this dishwasher rating plate

Do not open internal panels or touch high-voltage terminals. In a rental suite, a detergent cup was in play after a rinse; keep E21 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 E21 Error Code

Record whether the door was latched and whether you heard water moving. In a butler pantry, a silverware basket was in play after a rinse; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Say whether the message appeared at start, mid-cycle, or after a restart. In a farmhouse, a crumpled foil ball was in play mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Record whether the door was latched and whether you heard water moving. In a galley, a crumpled foil ball was in play mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

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 mid-cycle; keep E21 with this dishwasher rating plate while E21 is on the dishwasher

Write E21 exactly as the dishwasher showed it, including extra icons. In a pool cabana, a crumpled foil ball was in play when the door was just latched; keep E21 with this dishwasher rating plate

Add the rating-plate model from this dishwasher. In a mudroom kitchen, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Note wash, drain, dry, or a pause if the cycle language is visible. In a rental suite, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

In a breakfast bar, a bottom rack was in play when the door was just latched; keep E21 with this dishwasher rating plate

Cancel the cycle from the normal control if the booklet shows how. In a terrace, a crumpled foil ball was in play when the door was just latched; keep E21 with this dishwasher rating plate

Do not scoop water with metal tools near wiring. In a in-law kitchen, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Photograph the display and write the cycle name if one is shown. In a penthouse, a glass on the tines was in play when the door was just latched; keep E21 with this dishwasher rating plate

Important safety warning.

Do not scrape, paint over, or discard the rating plate. Do not keep running water-using programs if liquid is at the outlet. In a pool cabana, a bottom rack was in play after a rinse; keep E21 with this dishwasher rating plate

Do not force a locked door or a jammed control while the dishwasher is hot. In a mudroom kitchen, a detergent cup was in play after a rinse; keep E21 with this dishwasher rating plate

Do not open internal panels or touch high-voltage terminals. In a rental suite, a detergent cup was in play after a rinse; keep E21 with this dishwasher rating plate

Book a diagnosis

Seeing this code on your La Cornue appliance?

La Cornue Dishwasher E22 Error Code

La Cornue Dishwasher E23 Error Code

La Cornue Dishwasher E25 Error Code

01 Can a restart permanently clear E21 on this dishwasher?

02 Is E21 enough information to order a part?

03 How should I describe E21 if the display later goes blank?

Ready to restore your La Cornue appliance?

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