Bertazzoni Coffee Machines ERROR - COFFEE TEMPERATURE Error: Coffee boiler sensor fault
What Does “Error – Coffee Temperature” Mean on a Bertazzoni CM24? The Bertazzoni CM24 automatic coffee system uses a dedicated NTC thermistor to monitor its brew boiler temperature continuously. When the control board receives a temperature reading outside the valid range — indicating a failed sensor or a boiler that never reached its target — […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. The machine has detected a temperature sensor fault and locked out all functions. Do not attempt to disassemble the boiler — it operates under pressure. Contact Bertazzoni authorised service.
Can I reset the code?
No. The use and care manual explicitly states "Call for service" for this error. A power cycle may clear a transient fault, but a persistent error requires technician diagnosis and component replacement.
When to stop immediately?
Stop if you notice: Error returns immediately after power cycle, Machine was making drinks normally and stopped mid-cycle with this error.
Symptoms You May Notice
Machine fails to complete its warm-up sequence and stops at the heating stage with all buttons unresponsive
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.
Display reads "Error - Coffee Temperature" and the machine cannot make any drinks including hot water
This is a hard lockout covering all drink functions. Unlike a maintenance reminder, this error cannot be dismissed without resolving the underlying hardware fault.
Possible Causes
NTC temperature sensor failure on the coffee boiler
A failed, shorted, or open-circuit thermistor causes the control board to read an impossible temperature value, triggering an immediate lockout.
Requires ProfessionalCoffee boiler heating element failure
If the brew boiler element burns out, the thermistor never registers the target temperature within the allowed warm-up window and the control board declares a coffee temperature error.
Requires ProfessionalSafe Checks You Can Do
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1
Power cycle the machine once
Turn the power switch off, wait 60 seconds, then turn it back on. If the error clears and the machine completes its warm-up normally, it was a transient fault. If the error returns, service is required.
A cold machine in a room below 50 °F (10 °C) can occasionally take longer than expected to warm up. Move the machine to a warmer location and try again before calling for service.
When to Call a Professional
Contact a qualified technician if:
- NTC sensor reads open circuit or shorted at room temperature
- Brew boiler element measures open circuit on a continuity test
- Control board boiler-temperature input reads outside expected ADC range
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