Can a restart permanently clear E03 on this coffee machine?

In a penthouse, a descaling bottle still sealed was in play after a rinse prompt; keep E03 with this coffee machine rating plate. E03 stays display text on this coffee machine; it is not a spare-part name.

Is E03 enough information to order a part?

In a carriage house, a milk pitcher was in play after a rinse prompt; keep E03 with this coffee machine rating plate. E03 stays display text on this coffee machine; it is not a spare-part name.

How should I describe E03 if the display later goes blank?

In a pool cabana, a milk pitcher was in play after a rinse prompt; keep E03 with this coffee machine rating plate. E03 stays display text on this coffee machine; it is not a spare-part name.

What is worth writing down before a visit about E03?

In a mudroom kitchen, a portafilter was in play after a rinse prompt; keep E03 with this coffee machine rating plate. E03 stays display text on this coffee machine; it is not a spare-part name.

La Cornue Coffee Machine E03 Error Code

A La Cornue coffee machine showing E03 needs notes from the kitchen, not a universal fault name from a website. In a in-law kitchen, a milk pitcher was in play before the first cup; keep E03 with this coffee machine 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 E03

Appliance Coffee Machine

Quick answer

Seeing E03 on a coffee machine? Photograph the control and stop if hazards are present. In a penthouse, a milk pitcher was in play before the first cup; keep E03 with this coffee machine rating plate.

Model compatibility: La Cornue reuses codes across series and model years, so E03 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

Start with the live control: E03. Write if flow, steam, or heat had already started. In a carriage house, a portafilter was in play before the first cup; keep E03 with this coffee machine rating plate. In a pool house, a portafilter was in play during a brew; keep E03 with this coffee machine rating plate. Nothing here names a single failed part for every series. In a butler pantry, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate. In a terrace, a descaling bottle still sealed was in play while steaming milk; keep E03 with this coffee machine rating plate.

Signs

Symptoms you may notice

Say whether the message returns as soon as a drink is requested. In a galley, a milk pitcher was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Record whether the tank, tray, or door was recently moved. In a basement kitchenette, a portafilter was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Say whether the message returns as soon as a drink is requested. In a tasting kitchen, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Record whether the tank, tray, or door was recently moved. In a courtyard, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Say whether the message returns as soon as a drink is requested. In a rooftop kitchen, a water tank was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Why it happens

Possible causes

Write E03 exactly as the coffee machine showed it, including extra icons. In a rental suite, a portafilter was in play before the first cup; keep E03 with this coffee machine rating plate

Add the rating-plate model from this coffee machine. In a breakfast bar, a drip tray was in play before the first cup; keep E03 with this coffee machine rating plate

Write if flow, steam, or heat had already started. In a butler pantry, a drip tray was in play before the first cup; keep E03 with this coffee machine rating plate

In a farmhouse, a water tank was in play before the first cup; keep E03 with this coffee machine 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.

Photograph the exact characters. In a rooftop kitchen, a descaling bottle still sealed was in play before the first cup; keep E03 with this coffee machine rating plate

Use a manufacturer-approved restart only if one is documented. In a ADU, a descaling bottle still sealed was in play before the first cup; keep E03 with this coffee machine rating plate

Confirm the tank or tray is seated the way the booklet shows, without forcing it. In a pool house, a milk pitcher was in play before the first cup; keep E03 with this coffee machine rating plate

Safety warning

Important safety warning

Important safety warning.

A burning smell or visible spark ends home checks immediately. In a studio, a descaling bottle still sealed was in play while steaming milk; keep E03 with this coffee machine rating plate. Do not keep requesting drinks after the same message returns. 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 keep running the coffee machine through a program that immediately fails. Do not keep running water-using programs if liquid is at the outlet. In a rooftop kitchen, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate

Do not order a part from E03 without an on-site confirmation. In a ADU, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate

Do not scrape, paint over, or discard the rating plate. In a pool house, a water tank was in play while steaming milk; keep E03 with this coffee machine rating plate

Get help

When to call a technician

Book a diagnosis

Do not wait through repeated failed cycles. If E03 keeps coming back on this coffee machine, schedule service with your notes. In a pool house, a portafilter was in play during a brew; keep E03 with this coffee machine rating plate.

FAQ

Frequently asked questions

References

Sources & references

This archive is observational and does not replace the papers that came with the coffee machine. In a penthouse, a drip tray was in play during a brew; keep E03 with this coffee machine 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 Coffee Machine E03 Error Code

Error code overview

What this code means

Symptoms you may notice

Say whether the message returns as soon as a drink is requested. In a galley, a milk pitcher was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Record whether the tank, tray, or door was recently moved. In a basement kitchenette, a portafilter was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Say whether the message returns as soon as a drink is requested. In a tasting kitchen, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Record whether the tank, tray, or door was recently moved. In a courtyard, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Say whether the message returns as soon as a drink is requested. In a rooftop kitchen, a water tank was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Possible causes

Write E03 exactly as the coffee machine showed it, including extra icons. In a rental suite, a portafilter was in play before the first cup; keep E03 with this coffee machine rating plate

Add the rating-plate model from this coffee machine. In a breakfast bar, a drip tray was in play before the first cup; keep E03 with this coffee machine rating plate

Write if flow, steam, or heat had already started. In a butler pantry, a drip tray was in play before the first cup; keep E03 with this coffee machine rating plate

In a farmhouse, a water tank was in play before the first cup; keep E03 with this coffee machine rating plate

Safe checks you can make

Photograph the exact characters. In a rooftop kitchen, a descaling bottle still sealed was in play before the first cup; keep E03 with this coffee machine rating plate

Use a manufacturer-approved restart only if one is documented. In a ADU, a descaling bottle still sealed was in play before the first cup; keep E03 with this coffee machine rating plate

Confirm the tank or tray is seated the way the booklet shows, without forcing it. In a pool house, a milk pitcher was in play before the first cup; keep E03 with this coffee machine rating plate

Important safety warning

Important safety warning.

What not to attempt

Do not keep running the coffee machine through a program that immediately fails. Do not keep running water-using programs if liquid is at the outlet. In a rooftop kitchen, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate

Do not order a part from E03 without an on-site confirmation. In a ADU, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate

Do not scrape, paint over, or discard the rating plate. In a pool house, a water tank was in play while steaming milk; keep E03 with this coffee machine 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 Coffee Machine E03 Error Code

Say whether the message returns as soon as a drink is requested. In a galley, a milk pitcher was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Record whether the tank, tray, or door was recently moved. In a basement kitchenette, a portafilter was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Say whether the message returns as soon as a drink is requested. In a tasting kitchen, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Record whether the tank, tray, or door was recently moved. In a courtyard, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Say whether the message returns as soon as a drink is requested. In a rooftop kitchen, a water tank was in play while steaming milk; keep E03 with this coffee machine rating plate while E03 is on the coffee machine

Write E03 exactly as the coffee machine showed it, including extra icons. In a rental suite, a portafilter was in play before the first cup; keep E03 with this coffee machine rating plate

Add the rating-plate model from this coffee machine. In a breakfast bar, a drip tray was in play before the first cup; keep E03 with this coffee machine rating plate

Write if flow, steam, or heat had already started. In a butler pantry, a drip tray was in play before the first cup; keep E03 with this coffee machine rating plate

In a farmhouse, a water tank was in play before the first cup; keep E03 with this coffee machine rating plate

Photograph the exact characters. In a rooftop kitchen, a descaling bottle still sealed was in play before the first cup; keep E03 with this coffee machine rating plate

Use a manufacturer-approved restart only if one is documented. In a ADU, a descaling bottle still sealed was in play before the first cup; keep E03 with this coffee machine rating plate

Confirm the tank or tray is seated the way the booklet shows, without forcing it. In a pool house, a milk pitcher was in play before the first cup; keep E03 with this coffee machine rating plate

Important safety warning.

Do not keep running the coffee machine through a program that immediately fails. Do not keep running water-using programs if liquid is at the outlet. In a rooftop kitchen, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate

Do not order a part from E03 without an on-site confirmation. In a ADU, a drip tray was in play while steaming milk; keep E03 with this coffee machine rating plate

Do not scrape, paint over, or discard the rating plate. In a pool house, a water tank was in play while steaming milk; keep E03 with this coffee machine rating plate

Book a diagnosis

Seeing this code on your La Cornue appliance?

La Cornue Coffee Machine E04 Error Code

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01 Can a restart permanently clear E03 on this coffee machine?

02 Is E03 enough information to order a part?

03 How should I describe E03 if the display later goes blank?

04 What is worth writing down before a visit about E03?

Ready to restore your La Cornue appliance?

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