I am looking at the PCB inside of a Zoujirushi rice cooker, and there is a component that I can't identify. It has 3 wires and is designated "OS1". I couldn't find anything about an OS abbreviation online, but the neighboring component is labeled OS2 and appears to be a crystal.
The component is bright blue and the covering material is a rough ceramic. It has three wires and is placed next to the crystal below the LCD in the picture below:
Here is a closer look at it:
The text on the component body appears to be "400C ~ 22.5" (hard to see because it's small and at an angle).
Note that the PCB is 2-sided, and all of logic stuff is on the other side. This side of the board is mostly controls, display, and power supply. Here's a picture of the other side:
The OS1 label appears in the lower right hand side of the large IC.