The ice cream machine broke down. No, it just had the sense to realize that it hadn’t been cleaned in two weeks. They removed the panel, shorted a contact that no one knew about, and everything started working again. And they cleaned it, too. How does it understand? The temperature in the ice cream tank had been too low for too long, and pasteurization hadn’t been activated in a while. Plus, the ice cream hadn’t been completely drained for a long time, and nothing with low viscosity had been poured inside.
She is smart enough not to serve ice cream if the temperature sensor that the cup touches shows too high a temperature. The ice cream is guaranteed to come out cold.
She also monitors the mixer motor’s revolutions to ensure the mixture’s consistency is just right. Additionally, she keeps an eye on the current in the motor to prevent it from burning out due to the overly viscous mixture.
And all of this dances together, slightly complicating the diagnosis. Because the diagnosis is—it’s not working.
It wasn’t working, immediately affecting three safety systems related to the temperature and viscosity of the ice cream. The staff tried to fix the problem by frequently clicking the dispenser lever. They also had to replace the dispenser. And they discovered that some refrigerant had gone missing. They refilled it. While they were fixing everything, they had to throw away two buckets of ice cream.