Knob sheared off. Plastic shaft broke in half. Half of the shaft is in the knob, the other half is imbeded in the rheostat temperature control assembly which is factory soldered to the circuit board. The only thing I can think to do short of buying a new $350 Control Assembly is to drill a centered hole in each part of the shaft and epoxy the shank of a machine screw into each end of the sheared shaft efectively joining them back together.
The only other thought is to drill out the broken shaft from the temp control assembly and attempt to replace it with a stell shaft of one sort or another. In looking at the rheostat of the temperature control assembly, I'm unsure how the shaft end joins and manipulates the rheostat inside.
Any thoughts?
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