Coffee Machines Diagnostics

Bertazzoni Coffee Machines
Error Codes

Meanings, severity levels, safe checks you can perform, and when to call a technician.

Enter the code shown on your coffee machines display

Is it safe to keep using it?

Depends on code severity. Low/Medium codes often allow continued use, High severity requires immediate stop.

Can error codes be reset?

Some codes clear after power cycle. Persistent codes indicate underlying issues needing repair.

When should I stop using it?

Stop immediately for water leak codes, burning smell, or any High severity error.

Most Common Codes

TIMEOUT FILLING UP BROILER SYSTEM OFF - FRONT PANEL OPEN PLEASE MILK CLEAN CLEAN GROUP GROUP ERROR DRAWER FULL ERROR - STEAM TEMPERATURE FLOW METER ERROR ERROR - COFFEE TEMPERATURE

All Codes

CLEAN GROUP DRAWER FULL ERROR - COFFEE TEMPERATURE ERROR - STEAM TEMPERATURE FLOW METER ERROR GROUP ERROR PLEASE MILK CLEAN SYSTEM OFF - FRONT PANEL OPEN TIMEOUT FILLING UP BROILER

Error Code Directory

Click any code for detailed troubleshooting steps

Low Medium High

Code Meaning Severity Common Symptom

CLEAN GROUP Routine 50-cycle cleaning due Low The CM24 tracks brew cycles since the last routine cleaning. At 50 cycles — roughly once per week for a household making 7 drinks per day — it requires the Routine Cleaning procedure before drinks can be made again. Coffee quality may have subtly declined in the final cycles before the prompt appears. View DRAWER FULL Used grounds bin is full Low The CM24 counts each brew cycle internally. When the count reaches the programmed threshold, it locks out all drink functions at the next power-on or at the next brew attempt, depending on the timing of the count. View ERROR - COFFEE TEMPERATURE Coffee boiler sensor fault High The CM24 brew boiler must reach a precise temperature before any drink function is available. If the NTC thermistor reports an impossible value, or the boiler never reaches temperature within the timeout window, the control board declares a coffee temperature error and halts all operations. View ERROR - STEAM TEMPERATURE Steam boiler sensor fault High The steam boiler must reach a higher operating temperature than the brew boiler. If the NTC sensor reports an impossible value or the boiler times out during warm-up, the control board shuts down the steam circuit and displays the error. View FLOW METER ERROR No water flow detected High The CM24 flow meter detects that water is not moving through the brewing circuit. The machine immediately halts all drink dispensing to prevent the pump from running dry, which could damage the pump seals. View GROUP ERROR Brew unit jammed High The brew unit piston mechanism attempted its cycle — compressing the coffee puck — but did not complete the stroke within the programmed timeout. The control board detected the failed cycle and locked out all functions to prevent further mechanical damage. View PLEASE MILK CLEAN Milk system cleaning required Medium The coffee system refuses every brewing or dispensing command, with the display locked showing the cleaning prompt until the milk cleaning routine is completed. View SYSTEM OFF - FRONT PANEL OPEN Front panel door open fault Medium Every button on the coffee system is ignored; the machine will not brew, steam, or dispense in any mode while the front panel is detected as open. View TIMEOUT FILLING UP BROILER Boiler fill timeout fault High All buttons are disabled and the machine cannot brew, steam, or dispense — the boiler fill failure prevents any function that requires pressurised hot water. View

Bertazzoni Coffee MachinesError Codes