I got back to this today. A wire in the mains plug was totally loose. Would
that making/breaking contact and multiple in-rush current be enough to break
the Woods. ?
I doubt it as less than 10mA sitting idle and 3 amp rating of the thermal
fuse in current terms, but what temperature would the transformer get to in
the worst situation of such make and break mains contact, probably enough
to get to 120 degrees C