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David AliAug 17, 2025
What to do if my Mars Coffee Maker displays no messages or 'Please Call Operator'?
- KKevin BarajasAug 17, 2025
If there are no messages on the display or the message “Please Call Operator” is displayed on your Mars Coffee Maker, first, ensure the brewer is switched on at the back using the ON/OFF switch. Next, check that the brewer is plugged into the socket and switched on. Finally, press any button to exit standby mode and turn on the display. If the problem continues, please contact customer service or your local MARS DRINKSTM supplier.