I believe you also do have a problem with a stuck caps lock button on your keyboard...
About the fans not starting, try to increase the "kickstart" period to a higher amount, your fans might be harder to get spinning than the original UM2 fans
In the Configuration_adv.h file you will find this line:
#define FAN_KICKSTART_TIME 100
change that to 1000, and see if it works then
Also, are you printing with Ultigcode from Cura? if not, then you have to do your own start gcode to do the priming of the hotend for you.
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neotko 1,417
Check the small fan if actually is 'on' as soon the head goes 40-50C
Also never turn off the printer unless the hotend has cooldown to 40-50C or the residual material will partially clog.
About the extruder no idea, saw that model from china / aliexpress but no idea.
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