Extruder thermistor not working

[trencapins]

I received the Prusa X and I have finished the assembly. The machine seems to work fine except for the extruder thermistor. This thermistor is not working. I have checked it is not a problem of the electronic board, since it works fine if I connect instead the hot bed thermistor.
I can see the broken wire.
Commercial assistance has asked me to post my problem in this forum

[William]

Hi,
You said

I can see the broken wire.

Could you take a picture of it and the status of LCD?
And have you tried fixing it?

[trencapins]

This is an image of the LCD screen. Please, note temperature is zero

[trencapins]

And in the following video you can see the thermistor fails, there is a wrong crimping of the wire:
https://drive.google.com/file/d/0B6CRDY ... sp=sharing

[William]

The thermistor cable is too loose,which make the thermistor has no a good connection to the heating block,and you can tighten it with tape.