We have had nothin' but problems with voltage reducers on heaters for years now.
Because they get hot & want to melt & burn everything around them { not to mention explode }....We don't mess with them anymore...
We install new 12 volt motors in them but, it is tough finding an exact replacement motor that has the same overall dimensions with the correct keyway pad for the blower cage set screw.
We got lucky & found replacement 12 motors at an electrical supply store that was going out of business a few years ago & we stocked up.
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