Hey out there!
I've been looking all over the internet to see if there was a problem like this, but I haven't had any success. I have a Cool Fire 1, and I can get it to "turn on" and have an output without any tank on. However, with the tank on, the mod wont even switch on. I have two different tanks that should work, as well as two different 18350 and a 18650 battery, and I have tried all combinations without any success.
The mod has been used on and off for a year now, and I am thinking of upgrading to a variable mod anyways. I still want to see if this is fried or not. Thanks for the help!