Chosen Solution
So far have replaced with new electrical module where all components are fitted together like speed control dial and capacitors and problem not solved, mixer it self have only three electrical components the main module and speed sensor and the corpse open sensor, there should be easy fix otherwise the motor is defective but is running continuesly at low speed so difficult to say is defective.
SOLVED UPDATE Problem was the speed control sensor located above on the motor with three cables, never thought such tiny part make the stand mixer defective. This sensor is installed on more kmix models so if you have such issue then you know where to look.
