I usually regularly vacuum the filter, but Passover preparations and working with contractors around my house have thrown me off schedule. I will inspect the filter today. I’ve had this unit for several years with none of this shutting down stuff going on. It’s so weird that simply changing the outlet, even the slot in a double outlet brings instant working again. Thanks for your detailed reply.
Such is the nature sometimes when one is close to the edge of something... if it is a temperature issue, a few degrees might just push it over the edge. The problem with saying that though is i’m not sure how it ties into exactly what you are experiencing... moving it and finding it goes back to working again.
Anyway, there are several responses you got to your question and I suspect that a correct answer is in there.