There is a bimetallic sensor (item # 56854) embedded underneath the pot. It looks like a bottle cap and when water boils off, the temperature increases above the boiling point causing the sensor to “pop.” When this happens, it hits the shut off stem assembly (item # 56857) in the middle of the base of the unit. The sensor can be caked with dirt and debris, not allowing it to adequately pop, or improperly mounted. The shut off stem assembly could be worn down, bent, or improperly mounted.
To resolve the issue, we recommend obtaining both parts and replacing them as necessary. They are relatively inexpensive and can be replaced with basic tools. It’s discussed and shown in our RM series instructional video: RM-55 Overview
If the unit is still covered under the 6 month warranty, please contact us for assistance.