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Is this supposed to be plugged in

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IMG_20150827_182757.thumb.jpg.23991d4401b653acfd63105bce557232.jpg. So I'm replacing my hot end as part of warranty repair when I opened my electronics housing for the first time ever and found this little guy unplugged. So is this guy supposed to be unplugged? If not where is it supposed to be plugged into? And finally what is it?


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I've seen that before - I think it's just an extra cable that isn't used. Are all 3 of your fans working on your print head - did you ever check the 3rd one on the back of the head? It should come on when the nozzle is > 40C. Or when you power on depending when you got the printer.

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