Anet A8 fan/extruder issue.

[Roberts_Clif]

I have my Cura settings set to run the fan at 100% after the first layer, no fan on the first layer.

I have never used the Fan at 100% the maximum is about 50%.
Using a half Circle duct around the Nozzle,

TL-W3M 3.jpg

I have designed a duct port to cool the throat using only Half of the Heat sink Below.

Image3.jpg

I feel like this has to be an electronics glitch somewhere but I'm hoping it's software or firmware related rather than hardware and could be an easy fix.
Thanks in advance for any help.

I wonder if the fan is not adding more noise to the circuit causing the failure.
Try using 50% to see if that helps.

Does your printer have a restore to factory. On my 3D Printers need to Restore Factory Defaults when it acts goofy.
(This happens when I try different Slicers and they mess with my Defaults.)
M502 ; Restore Factory Defaults
M500 ; Store Settings.