The one on my machine has gone kaput the usual channels have not uncovered a replacement 🙁
The machine’s model number is A3586 and the left hand thermostat (as one looks at the backplate from the rear of the machine) is the one that has failed – as the machine heats up to 60 degrees on the 40 cycle.
The thermostat has a violet spot on it and the part number is either HVR676890 or 9036096.
Glad to know these are not obsolete. I also have an old Logic A3586 which is catering for a family of four. Surprisingly energy efficient and reliable it is too… Famous last words!