[Vt75 screen shows 'off' rather than the temp]

Thanks for the suggestions! Gave the 510 and battery cap a good clean with alcohol and it seems better....

[Vt75 screen shows 'off' rather than the temp]

Hi, struggling with my dna75. In Tc ss316l, the screen just displays 'off' rather than the temp rising..... It still vapes but obviously im not sure its regulating temp? Any ideas? I factory reset not long ago and only changes I have made are case analysis and set the internal resistance (0.004 if i recall). Thanks