I didnt investigate further as it printed no problem for 2 hours afterwards. The temperature fluctuations stopped instantly after moving the pc away from the wires with really stable temps as well.
Im pretty convinced it was just that but not a bad idea to check that though.. Ill take a closer look and see its loose. As far as a flaky thermistor goes, is there a way to check to see if its working properly aside from swapping it out for a known working unit?
Bring it up to temp and then manually move the wires/bundle to see if that has an effect on temps?