Vita-Mix 5000 blender shuts off under heavy blending loads.
first check the blades on the container thay should turn easy by hand if not thats your problem , you will need blades . blades turn easy ? you will need to replace the motor . the temp /overload has changed and is tripping to easy . this is common with people that use there vitamix for tough chores a lot . a lesser blender would just burn up a motor in a puff of smoke .a vitamix dies this way . in the end its the same you will need a motor
Vitamin 3600 canister leak
I think it's the little washer in the blade assmbly since mine was worn to a sliver when it started doing what yours did. I replaced it with a similar washer and it worked for a week and then started spitting out metallic dust until it stopped working again. Could be the bearing seized. I would say yes a new blade assembly but I hadn't found one- since I have a 3600 which is very old-when my husband bought a used replacement container with a working blade assembly on ebay. $37 bucks, problem solved.
Blow out fues
Stoped working...a fuse burnt out on the circut, smelled like burning. Don't know where the fuse is to check.
Vitamix troubleshooting
Track continuity inside with a multi meter. Pay attention to continuity of switches, they are a bit unreliable design.
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