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The variable speed does not work. The high speed does, How can I fix it. This is a vitamix prep 3

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The speed switch is either not making good contact inside or it is burned out. If you are handy you can check it by removing the switch and opening it to clean off the contacts with some rubbing alcohol and rough cloth. If it is burned out or you do not dare to open it...buy a new one. Go to the Vitamix website and request a parts list.

Posted on Jan 02, 2013

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Posted on Jan 02, 2017

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1 Answer

Can the circuit board on the Vitamix be placed? I have a 5200 model which only runs on high. Changed the variable switch-no change to the speed.


Hello Melanie Richardson,

Looking around on the internet I did find parts houses
peddling parts...

But when I tried to go through the front door of VITAMIX... are interested in SERVICE (didn't seem all that WELCOMING to Do-it-
yourself OWNERS...

The short answer is yes ...


Vitamix 5200 Getting Started Machine

May 13, 2016 | Vitamix 5200 VariableSpeed Blender

1 Answer

Blender appears to be stuck on high. Today we changed the variable speed button blender still appears to be stuck on high.


The speed control usually is by electronics. The speed control switch will merely be telling the circuitry what speed is required but if the circuitry is faulty nothing will happen.

May 13, 2016 | Vitamix 5200 VariableSpeed Blender

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Vitamix 5000 variable speed control broken


Have a look at this, this guy has done the job.

http://uppityairlinepilot.blogspot.co.nz/2012/09/vita-mix-5000-variable-speed-fix.html

May 18, 2015 | Vitamix 5000 Work Top Blender

2 Answers

When i turn it onto high speed it willl fuse istanlty. (Even with somthing easy to blend like a smoothie) .Any ideas what could be wrong?


I would suspect a motor fault, most likely an insulation problem in the armature or the fields. Contact Vitamix for your local authorised service agent. Unless it has been assembled incorrectly it should not be one of the internal wires as they are supposed to be secured and correctly routed during assembly.

Mar 31, 2015 | Vitamix 5000 Work Top Blender

1 Answer

Why does my vitamix machine only have low and high, no variable dial?


You need to pay more money and buy the better model to get the speed control.

Jul 06, 2014 | Vitamix 5000 Work Top Blender

1 Answer

Variable speed does not work


Check here for replacement of necessary part to be replaced.

Fairly easy to do. You can find a video on how to replace a vitamix potentiometer or Pot for short, check youtube.

vitamix potentiometer

Feb 09, 2014 | Vitamix 5000 Work Top Blender

1 Answer

Can't unscrew drive socket on vitamix super 5000 to replace it. The 5/64 hex wrench does not fit in. And another problem is that variable speed does not function. It is possible only slow or high speed.


The hex wrench only fits in one position, there is a groove in the lip in the top housing and you need to turn the coupling until the hex screw head lines up. The groove is normally plugged with a dob of white silicone. The hex screw is not tightened fully tight on reassembly, the coupling needs a bit of slop. Speed control problem will likely involve replacing the control switch assembly.

Aug 25, 2013 | Vitamix 5000 Work Top Blender

1 Answer

I have this model and a vita prep 3. Both turn off when tasked with heavy blending. Is there anyway to increase their blending torque capacity? They used to be much better. They are not old machines.


The motors even if they not old blenders if they have work with too much load for along time then they have been overheated and thus they will trip overheat safety more sensitive. So now actualy you have less blending torque as you have describe. So now their is much posibilty if you continue to work it the same way you will finally burn the motor rotor so the damage will be grait.
So now not only you can not get more torque but you should try to avoid very heavy use in order to have them work for a longer time.
When you use with a lot of ice cubes try to cover them with a lot of liquids and always use the pulse mode to start ant the continues rotation.
Good luck

Aug 14, 2010 | Vitamix 1003 Vita-Prep Variable Speed...

1 Answer

My vitamixer's variable speed switch is stuck on about 2/3 speed. the on/off switch works fine. the high/variable switch changes from high to about 2/3 speed. the variable speed dial has no effect of the...


This problem sounds like failure of the Variable Speed Potentiometer component. Here is the most helpful Fixya article so far: http://www.fixya.com/support/t6032529-need_replace_speed_control
I have the same problem right now and don't want to pay ridiculously high prices for a small electronic component.
So far, this is as far as I've gotten in researching replacement parts:Vitamix Part #015955
Partstown sells #15955 for $23.39 on their website but I found out they charge $15 for shipping -- for a one-ounce piece of electronics. I won't pay to be ripped off on shipping so I won't buy one from Partstown until I've exhausted less-expensive suppliers. Here is the product at Partstown: http://www.partstown.com/vita_mix/vm15955

Another Fixya contributor, Robert Sadler, said he was going to try a generic potentiometer from Mouser.com. His descriptions are kind of vague for me. I'm not an electronics expert so I'm not very confident I can interperet his description:

"If you are comfortable with soldering, you can get a replacement part at Mouser.com. The pot is a 5k "slimline" made by Bourns, however looking inside the cover it looks like most pots would fit. I ordered one for a bit over $5 and will update when I get it with how it worked. You would just have to solder the existing wires to it." -Robert Sadler

I have no problem soldering the existing wires onto a new component but I don't really know what would be an appropriate potentiometer to buy as a replacement from an electronics supplier. In addition, Mouser's website seems to sell potentiometers only in bulk quantities of 5, 6, 12, or 45 items at a time. I just want one.

If anyone knows how to interpret Robert Sadler's comments, or has actually done this repair, please post below. I'm sure quite a few people would benefit from a high-quality repair at a low component cost.

Apr 08, 2010 | Vitamix 5000 Work Top Blender

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