C19 error appears when trying to start a program that uses the integrated timer or when resuming after a pause.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

RTC circuit failure on main PCB, Corrupted timekeeping firmware, Power supply instability to RTC, Damaged backup capacitor or battery (if present)

Safety first: Disconnect from mains before any internal inspection.

Power cycle: Unplug the Thermomix for 5–10 minutes, then plug back in and set the time/date again if required.
Firmware update: Install the latest firmware using official methods, as some timer-related faults are software-correctable.
Service recommendation: If C19 persists, the RTC circuit on the main PCB is likely defective. The main board will need to be replaced by an authorized service center.

Hard 4/5

Main Control Board (RTC Circuit)

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