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Mine is f'ed up now. It will run a 1.7 ohm tank at 3.9, but it wont run my 3.0 ohm atty at all. At any voltage. I checked it with a ohms meter, still reads good, checked the lava tube with no load, and it reads the correct voltage. Obviously something funky has happened with the electronics. I won't be able to get in contact with Volcano for a while either. You get what you pay for. Luckily this wasnt my main device.
Sorry to hear this.
Could it be the batteries? Do you have another Battery from another mod you can try. Also, what would happen if you took the Battery out and let it sit overnight. Do the Electronics inside reset?
Try the Noalox on the threads and I hope you don't have to send it back.