Wow, you can find all kinds of stuff on the web..
https://en.wikipedia.org/wiki/Auto-defrost
I didn't know if the timer was ever going to click on and run a defrost cycle,
so I kept watching the kill-a-volt for about 6 hours. I became ill, and had to quit.
Feel better now, after a nice afternoon nap..
Maybe tomorrow I'll try to remove temperature control panel cover to see if the timer can be manually advanced..
Looking at the picture of the part, I don't see any manual advance knob..