Chosen Solution

Blender has a rattle in the base, like a loose piece, Have not been able to use for months. Total in use less than a year.

I have found this company to be fantastic about warranty repairs and replacements. Contact them here: https://www.blendtec.com/pages/warranty

Try removing the bottom cover. Sometimes the cooling fan blade comes loose and the blender will overheat and shut down (and might display “overload” on the screen). The loose blade, washer and screw might be what’s rattling inside!