Mintemp error, thermistor and heating cartidge seem fine

Howdy,

The Taz v5 printer with Marlin 2015Q1 hardware has started giving a mintemp error after dissolved a jammed piece of filament by in acetone and scrapped it out. After putting the printer back together it started giving us this error, however our thermositor and heating cartridge

both seem to be in fine condition and reconnecting them more tightly did not resolve it. The heating cartridge wire was only recently put in, i attached pictures of the part below. I appreciate the help.
20180220_150950.jpg
20180220_150948.jpg
20180220_150945.jpg
20180220_145833.jpg
20180220_150959.jpg

Your thermistor wire for the hot end in the picture only has one lead/wire attached to it. :confused: