Vitamix 15762 Speed Control Circuit Board

Works as described

Vita-Mix Model VM0103 worked on full speed but not on variable. My wife uses this at least every other day. After ordering the main poteniometer and not fixing the problem I returned it (thanks to Amazon easy returns) and found and ordered this variable speed circuit board assembly. It arrived in two days and included excellent instructions with color pictures of the two different motors as not all are the same, and clear color pictures of the circuit boards. On the circuit board there are two DIP switches and a Speed Potentiometer. Depending on which motor you have you may need to set the DIP switches. There are A and B motors. Mine was identified as a B motor (metal lower housing clearly shown by the provided picture). With my B motor I needed to set the DIP switches both to OFF and on all motors you will need to adjust the Speed Potentiometer on the board for optimal speed on the lowest setting (identified as 1000 to 1500 RPM in the instructions) once you have it installed. It took a couple of tries to get this where the speed sounded right on low as I made small adjustments then put the unit top back on to plug in and test. I would not suggest trying to adjust this with it open and 110 V exposed. You could get zapped or at the very least short out the board. Saved spending $450 on a new one. Just as an aside, this circuit board assembly comes with a new main potentiometer that goes in the front panel and research indicated that this main poteniometer can be be a point of failure so I kept the old one just in case.

I installed the board and unfortunately it did NOT repair the nonworking variable speed function of my VitaMix. Amazon does not know anything about how this part works (they were nice on the phone telling me so, though). They did tell me that VitaMix makes the part for them, but when I called VitaMix they refuse to say anything about how the part is supposed to function. They only want you to send the blender to them for the repair. I want to fix the blender myself so I am not without my blender for weeks on end. I guess they assume that everyone knows nothing about electricity.... Amazon was great as when I called them back, they offered to take the part back and provide a full discount and even cover the return shipping cost.

My blender would only run at high speed when turned on, had no variable control. Couldn't understand why it would fail me after 20 years but it did ;). I installed this circuit board after testing the blender speed switch and variable speed potentiometer. They both tested ok. This 15762 Speed Control Circuit Board solved the problem.

After many years of use, my beloved Vitamix 5000's variable speed quit working. The logical choice seemed to be the potentiometer so after ordering one and installing it the problem persisted. After a little more research and the only other possible fix, I ordered the control circuit board. After following the instructions (my model has a metal base and therefore needed to turn off the two switches on the circuit board) and installing the circuit board my Vitamix works as good as new. If I would have known beforehand I would have ordered this circuit board first since it also comes with the potentiometer. All in all I am very happy with my purchase.