Geeetech A10 blocking in teflon tube

[sarjekemo]

Hi all,

Lately my Geeetech A10 is non stop blocking, but the blockages are occurring in the heat break where the nozzle and teflon tube meet.

I have swapped to different filaments, different nozzles, different teflon tube, different extruder motor and different extruder mounts.

The issue occurs if im using simplify3D or cura.
Tweakbox Appvalley https://vlc.onl
Temp graphs for the hot end shows its stable +/- 1°C, there abouts.

Is there anything else im missing?

Thanks!