83EL77S
J4758585
I removed the Vernatherm and tested it in on the stove, the tip pushed out in a few minutes. I let it cool for a few minutes but it did require firm pressure to push it back down. It was in when I removed it so I think it is working properly.
The spring-loaded plastic piece on the top of the thermostat housing seems to be functioning properly as well.
Sound right?