Sit rep: Oven on kitchen floor, back and top removed.
Red dot thermostat was physically looking a bit knackered; the crimped metal lugs holding the block of lightly browned ?ceramic in place were splayed slightly apart allowing it to wobble a little and not make firm contact with the oven cavity outside wall. I've removed the red dot stat and bent the lugs back into their correct position. Upon reassembly I'm still reading continuity across the terminals on both stats.
Fan oven now powered up; I've got an IR thermometer to check temperature against the dial and I'm going to see what happens to the stat resistances at around 100C for starters.
SWMBO in other room, catching up on Eastenders. Child a in bed, child b watching videos of people playing Minecraft in his room.
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