Product review (5 stars): Direct replacement variable speed controller for Vitmix 5200 #VM0103
Direct replacement for my 2013 Vitamix VM0103. I purchased this switch to fix the variable speed controller that would accelerate the motor speed randomly on its own without input from the switch. The switch I received #15955 is a bit stiffer to turn than the original but does not effect performance. Once I replaced it the acceleration is now smooth and controller using the variable speed dial. Make sure you get the tab on the Potentiometer lined up correctly so the dial indeed starts at 0. It took all of about 5min to replace the switch. Due to the age of my blender I'm not concerned about warranty issues and this was much cheaper option than sending it in for repair if your are a Do-It-Yourselfer. Required only a phillips head screwdriver, needle noise pliers and wire cutters (cut existing zip ties) to replace switch. This Potentiometer "might" solve your issues with the variable speed controller and is worth a try compared to replacing or sending it back to the manufacturer if your out of warranty.