prince.sorry

So the either day my vape was working perfectly fine, and suddenly I noticed that every time I fired it, nothing happened. I switched the batteries and same thing, so it's not the batteries. I switched the tank, it wasn't the tank. I have the koopor plus 200w and was running it at 85w and I use the tfv4 tank. When I fire the mod the mod fires, but the tank doesn't heat up at all, and the voltage meter stays at 0. I don't understand why it's doing this, I got it around 3 months ago. Could it be a wire the I could fix or a part? Any ideas and suggestions would be great. I cleaned all of the conecters and the tank completely afterwards and it made no difference.