Hi BeauJangler, I have a few varicool boxmods(built by me, for me)and I have noticed this issue on occasion mostly with the dc cartos . It would be worth a check to be certain that the dc center contact is actualy making good contact. The production of the Dual Coil Cartos is less than great so a simple toothpick, unbent paperclip etc to the center connector hole while wiggling the contact outward almost always does the trick for me. Be gentle it only usually needs to come out less than a milimeter. My boxes use the 6a or 10a chip so theres nothing that I have ever tried to run, at any given voltage, that wouldnt fire unless it wasn't making good contact. Hope that helps. Good Luck. Happy
Vaping.
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