...I think the problem is he has it
set to 400F but it's not
getting there.
@battouter, it may just be that 30W is not enough to drive that coil. In my opinion, there's really no reason to set the wattage anything less than as high as it will go when using TC mode (presuming you get to set it at all, some devices just do this automatically). Presuming that the idea is that you want to vape at a particular temperature, it seems like you would want to reach that temperature as soon as possible. It baffles me why some people (not saying you) use TC mode and then actively try to avoid hitting the temp setting. Like, if the temperature control kicks in, it doesn't mean you've done something wrong, in fact just the opposite. It means that it's doing exactly what it's supposed to do, which is to bring the coil up to your set temperature and then keep it there.