I was trying to help you out here. Maybe this will help some? I was going backto some customers that asked questions in the recent past and even fartherback. It appeared that no one answeredsome of them, So, I thought I would take some of my personal time to see if Ican help. Even though this Informational site may not have your exact model orbrand, this site will help you a lot. Here is a site link about everything you want to know about blenders andpossibly yours, from repairto trouble shooting it. http://home.howstuffworks.com/how-to-repair-small-appliances5.htm Please if this helped you at all, if you can find the time and in your heart torate my help and some kind words written would be appreciated for my free help, I would appreciate it.
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I was trying to help you out here. Maybe this will help some? I was going backto some customers that asked questions in the recent past and even fartherback. It appeared that no one answeredsome of them, So, I thought I would take some of my personal time to see if Ican help. Even though this Informational site may not have your exact model orbrand, this site will help you a lot. Here is a site link about everything you want to know about blenders andpossibly yours, from repairto trouble shooting it. http://home.howstuffworks.com/how-to-repair-small-appliances5.htm Please if this helped you at all, if you can find the time and in your heart torate my help and some kind words written would be appreciated for my free help, I would appreciate it.
Here is also my direct link to my own pages of other areas of my expertise forother problems you might have in Automotive, Appliance, and Electronics. DropIn anytime for my help.
Check the black driving clutch on the top of the motor that engages with the other clutch half on the base of the blender jug. The fault should be there, normally it will be the motor part.
What has worked very well for me in the past in similar situations (not with kitchen appliances but any older item needing a part) is find people selling the item or parts for the item on eBay, and then messaging them asking if they have a source for whatever it is I am looking for.
Almost always this leads to what I need, whether it is for a camera or an old watch or a vintage computer or whatever.
Messaging through eBay is easy, fast, and free.
Simply type Vitamix 4000 in the Search box, and get the listings displayed, and then click on Contact Seller.
eBay will send the message, and notify you when there is a reply.
Some models had a weakness with the variable resistance in the rotary switch but your description sounds more like the main PCB or even the motor both of which are very expensive parts to replace.
