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Try unscrewing the 510 connector from the vt75 and give it a good clean and refit, also give your atomisers 510 a good cleaning. This sorted mine out.

Exactly the same happened to me with one atty only. Which was odd as the same atty and coil worked perfectly on another Dna mod. It's definitely a connection problem. I took my whole mod apart and cleaned all the contacts and threads as well as the atty and it's been perfect since, so give that a try too.

Thanks for the advice Vaping Bad! Took the whole device to pieces and cleaned all contacts and threads with alcohol, it's back to behaving again.

Hi guys, I have a bit of a weird problem with one atty (limitless RDTA) on my hcigar vt75 and can't figure out what's causing it. The Ohm reading is all over the place, sometimes it displays the temp with ridiculous numbers (E.G. 344986F) and jumps out of temp mode (off). I've got it setup with 317l ss using the same profile as on my dna200 and the atty works perfectly on the 200 and all my other atomisers work perfectly on the dna75. The coil obviously isn't shorted anywhere neither is the atty as it's fine on the 200. The 510 is definitely making contact so I'm at a bit of a loss as to what's happening! Any ideas on what to try?