En el artículo , pedro
escribió:

(*) I date-mark the parts as they go in. The one that just failed was
one day short of 18 months, on an oven that gets used about once a
week on average.

You seem to have the fault identified, but just to add another
perspective - since you're getting multiple failures of the solenoid
coils, and you're /assuming/ RoHS lead-free soldering is to blame
without having (yet) found evidence, perhaps you could look at other
common factors. Is the supply voltage to the coils stable, for
instance? Loose connection causing unstable voltage/surges/sags at the
coil? Voltage too high? etc. etc.

--
(\_/)
(='.'=) systemd: the Linux version of Windows 10
(")_(")