Corning PC520 PC-520 hotplate hot plate pilot prep heating

used working Corning hotplate model PC-520 115 v.. 525W. the heating regulator working well. 10"x10" ceramic plate. the stirring regulator does not work (no stirring observed). so. I am selling the unit as hotplate only. If not satisfied. You can return this unit within 30 days for a full refund minus shipping.lot con4/1left