Nespresso Coffee Makers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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Cup Size LEDs Flashing Alternately
Espresso and Lungo (or multiple cup size) LEDs flash alternately, and the machine will not brew.
Programming / Calibration Mode or Fault
Descale Light On Solid
The descale indicator remains on; the machine still brews but warns of scale.
Scale Accumulation Detected by Usage Counter
Error 1
Machine does not heat; coffee button lights may blink rapidly, and brewing will not start.
Thermoblock Overheat or Open Circuit
Error 10
Machine overheats and shuts down; an overheat icon or Error 10 is displayed.
Overtemperature Protection Triggered
Error 2
Machine powers on but the pump does not run; no water flow when brewing is started.
Pump Circuit Failure
Error 3
Machine stops mid-brew and lights flash; the capsule area may be flooded with water.
Brew Circuit Overpressure or Flow Obstruction
Error 4
Machine will not start; all LEDs blink rapidly, or a general fault icon appears.
Control Board General Fault / Self-Test Failure
Error 5
Machine detects a water leak; some models show a leak icon or Error 5 and stop brewing.
Internal Leak Detection / Drip Tray Overflow
Error 6
The capsule lever cannot lock or unlock; the machine shows an error and will not brew.
Brew Head Lock Mechanism Fault
Error 7
The milk frother (integrated Aeroccino or milk carafe) does not operate; the milk icon blinks, or an error is displayed.
Milk Frother Heater or Motor Fault
Error 8
Cup tray or drip tray sensor error; the machine refuses to brew and indicates a tray issue.
Drip Tray / Container Presence Sensor Fault
Error 9
The descale light or message remains on after descaling; the machine may refuse to brew and shows Error 9 or a descale icon.
Descale Mode Exit / Flow Meter Recognition Fault
Orange Light Blinking Fast
Fast blinking orange light; the machine refuses to brew.
Water System or Capsule System Error
Orange Light Pulsing
On some Nespresso models, a pulsing orange light indicates the machine is in a special mode (descale, clean, or error).
Mode / Program State or Minor Fault
Red & Green Alternating
On some Vertuo models, red and green lights alternate, and the machine will not brew.
Capsule Recognition / Barcode Reading Fault
Red & Yellow Alternating
On some Vertuo models, red and yellow lights alternate, and brewing is disabled.
Descale Required / Severe Scale Detected
Red Light Blinking Fast
Fast blinking red light; the machine will not start brewing.
Pump or Flow Error
Red Light Steady
On many Nespresso OriginalLine models, a steady red light appears, and the machine does not brew.
General Heating or Electronics Fault
Used Capsule Container Icon Flashing
The used capsule container icon flashes; the machine refuses to brew even when the container is empty.
Used Capsule Container Presence / Full Sensor Fault
Water Tank Icon Flashing
The water tank icon flashes even when the tank is full; the machine will not brew.
Water Tank Presence / Level Detection Fault
Symptom
Burning smell during operation, with or without visible smoke.
Overheating Electrical Component
Symptom
Buttons are unresponsive, or only some buttons work intermittently.
User Interface / Keypad Failure
Symptom
Capsule is not pierced; water flows around the capsule or into the drip tray without brewing coffee.
Capsule Piercing Mechanism Failure
Symptom
Capsules are not ejected; used capsules remain stuck in the brew head.
Capsule Ejection Mechanism Jam
Symptom
Coffee dispenses only a few drops or is much less than the selected volume.
Restricted Flow / Under-Dosing
Symptom
Coffee is not hot enough, even immediately after brewing.
Low Brew Temperature
Symptom
Coffee tastes weak or watery compared to usual.
Low Extraction Pressure or Incorrect Flow
Symptom
Coffee volume is too large; the cup overflows compared to the programmed size.
Over-Dosing / Flow Meter Miscalibration
Symptom
Lever is very hard to close or open; loud cracking noises when operating the lever.
Mechanical Binding in Brew Head
Symptom
Machine makes a loud buzzing sound but no water comes out.
Pump Running with No Flow
Symptom
Machine powers on but does not heat; water flows cold through the spout.
No Heating / Open Heater Circuit
Symptom
Machine stays in preheating mode indefinitely; ready lights never come on.
Preheat Timeout / Temperature Feedback Fault
Symptom
Machine will not power on at all; no lights or response when buttons are pressed.
No Power / Dead Appliance
Symptom
Musty or moldy smell from coffee or from inside the machine.
Microbial Growth in Wet Areas
Symptom
The machine shuts off unexpectedly during brewing and must be restarted.
Intermittent Power Loss / Thermal Cutout
Symptom
The machine vibrates excessively and moves on the counter during brewing.
Excessive Vibration from Pump
Symptom
The milk frother heats but does not froth (no foam).
Mechanical Frothing Failure
Symptom
The milk frother spins but does not heat milk.
Milk Frother Heater Failure
Symptom
Unusual loud rattling or grinding noise during brewing.
Mechanical Noise from Pump or Brew Mechanism
Symptom
Water leaks from the back or bottom of the water tank area.
Water Tank or Tank Valve Leak
Symptom
Water leaks from under the machine during or after brewing.
Internal Water Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| Cup Size LEDs Flashing Alternately |
Espresso and Lungo (or multiple cup size) LEDs flash alternately, and the machine will not brew.
|
Programming / Calibration Mode or Fault | View Details |
| Descale Light On Solid |
The descale indicator remains on; the machine still brews but warns of scale.
|
Scale Accumulation Detected by Usage Counter | View Details |
| Error 1 |
Machine does not heat; coffee button lights may blink rapidly, and brewing will not start.
|
Thermoblock Overheat or Open Circuit | View Details |
| Error 10 |
Machine overheats and shuts down; an overheat icon or Error 10 is displayed.
|
Overtemperature Protection Triggered | View Details |
| Error 2 |
Machine powers on but the pump does not run; no water flow when brewing is started.
|
Pump Circuit Failure | View Details |
| Error 3 |
Machine stops mid-brew and lights flash; the capsule area may be flooded with water.
|
Brew Circuit Overpressure or Flow Obstruction | View Details |
| Error 4 |
Machine will not start; all LEDs blink rapidly, or a general fault icon appears.
|
Control Board General Fault / Self-Test Failure | View Details |
| Error 5 |
Machine detects a water leak; some models show a leak icon or Error 5 and stop brewing.
|
Internal Leak Detection / Drip Tray Overflow | View Details |
| Error 6 |
The capsule lever cannot lock or unlock; the machine shows an error and will not brew.
|
Brew Head Lock Mechanism Fault | View Details |
| Error 7 |
The milk frother (integrated Aeroccino or milk carafe) does not operate; the milk icon blinks, or an error is displayed.
|
Milk Frother Heater or Motor Fault | View Details |
| Error 8 |
Cup tray or drip tray sensor error; the machine refuses to brew and indicates a tray issue.
|
Drip Tray / Container Presence Sensor Fault | View Details |
| Error 9 |
The descale light or message remains on after descaling; the machine may refuse to brew and shows Error 9 or a descale icon.
|
Descale Mode Exit / Flow Meter Recognition Fault | View Details |
| Orange Light Blinking Fast |
Fast blinking orange light; the machine refuses to brew.
|
Water System or Capsule System Error | View Details |
| Orange Light Pulsing |
On some Nespresso models, a pulsing orange light indicates the machine is in a special mode (descale, clean, or error).
|
Mode / Program State or Minor Fault | View Details |
| Red & Green Alternating |
On some Vertuo models, red and green lights alternate, and the machine will not brew.
|
Capsule Recognition / Barcode Reading Fault | View Details |
| Red & Yellow Alternating |
On some Vertuo models, red and yellow lights alternate, and brewing is disabled.
|
Descale Required / Severe Scale Detected | View Details |
| Red Light Blinking Fast |
Fast blinking red light; the machine will not start brewing.
|
Pump or Flow Error | View Details |
| Red Light Steady |
On many Nespresso OriginalLine models, a steady red light appears, and the machine does not brew.
|
General Heating or Electronics Fault | View Details |
| Used Capsule Container Icon Flashing |
The used capsule container icon flashes; the machine refuses to brew even when the container is empty.
|
Used Capsule Container Presence / Full Sensor Fault | View Details |
| Water Tank Icon Flashing |
The water tank icon flashes even when the tank is full; the machine will not brew.
|
Water Tank Presence / Level Detection Fault | View Details |
| – |
Burning smell during operation, with or without visible smoke.
|
Overheating Electrical Component | View Details |
| – |
Buttons are unresponsive, or only some buttons work intermittently.
|
User Interface / Keypad Failure | View Details |
| – |
Capsule is not pierced; water flows around the capsule or into the drip tray without brewing coffee.
|
Capsule Piercing Mechanism Failure | View Details |
| – |
Capsules are not ejected; used capsules remain stuck in the brew head.
|
Capsule Ejection Mechanism Jam | View Details |
| – |
Coffee dispenses only a few drops or is much less than the selected volume.
|
Restricted Flow / Under-Dosing | View Details |
| – |
Coffee is not hot enough, even immediately after brewing.
|
Low Brew Temperature | View Details |
| – |
Coffee tastes weak or watery compared to usual.
|
Low Extraction Pressure or Incorrect Flow | View Details |
| – |
Coffee volume is too large; the cup overflows compared to the programmed size.
|
Over-Dosing / Flow Meter Miscalibration | View Details |
| – |
Lever is very hard to close or open; loud cracking noises when operating the lever.
|
Mechanical Binding in Brew Head | View Details |
| – |
Machine makes a loud buzzing sound but no water comes out.
|
Pump Running with No Flow | View Details |
| – |
Machine powers on but does not heat; water flows cold through the spout.
|
No Heating / Open Heater Circuit | View Details |
| – |
Machine stays in preheating mode indefinitely; ready lights never come on.
|
Preheat Timeout / Temperature Feedback Fault | View Details |
| – |
Machine will not power on at all; no lights or response when buttons are pressed.
|
No Power / Dead Appliance | View Details |
| – |
Musty or moldy smell from coffee or from inside the machine.
|
Microbial Growth in Wet Areas | View Details |
| – |
The machine shuts off unexpectedly during brewing and must be restarted.
|
Intermittent Power Loss / Thermal Cutout | View Details |
| – |
The machine vibrates excessively and moves on the counter during brewing.
|
Excessive Vibration from Pump | View Details |
| – |
The milk frother heats but does not froth (no foam).
|
Mechanical Frothing Failure | View Details |
| – |
The milk frother spins but does not heat milk.
|
Milk Frother Heater Failure | View Details |
| – |
Unusual loud rattling or grinding noise during brewing.
|
Mechanical Noise from Pump or Brew Mechanism | View Details |
| – |
Water leaks from the back or bottom of the water tank area.
|
Water Tank or Tank Valve Leak | View Details |
| – |
Water leaks from under the machine during or after brewing.
|
Internal Water Leak | View Details |
No matching codes found
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