How long have you had it? I'd suggest, (unless you are really electrically and mechanically minded) to bring it/send it back to where you purchased it from, and or use the warranty for a replacement. If it's doing that with all your batteries, I'm going to guess it's the mod. KT products are great (when they work) some people swear by them but they do sometimes come with Quality control issues, and if a mod of mine were doing that, I'd head straight to my favorite vape shop and hand it to my electrically minded salesman, if there is one available, and if they couldn't fix it, I'd send it back. If you have a Freedom Smoke USA near you, I might go there because I think they sell more KT products than any of the other vape stores I've run into, so they may be your best bet. That being said, my electrically minded salesman who knows me by name, heh, has fixed multiple tanks or mods that I have not purchased from them, for free. Then I buy a bottle of juice to keep them in business....
Sorry I don't have more to offer as far as troubleshooting, I'm just leary of troubleshooting any mod myself, because unless I somehow *absorb* enough knowledge from this site (I am absorbing a great deal, just not enough to OMG, try to repair a mod) I'm going to find someone else to take a look at it. Never hurts, and I wouldn't try to vape on it, in the meantime, either.
Good luck!
Anna
