If your Mod or Vape can't fire, here are probable causes and solutions depending on different devices.

Box mod：

    1. Show message “no coil”

        Possible Reasons:

        I. Bad connection for the 510 connectors.

        II. Coil issue, no resistance.

    2. Show message "short atomizer", or "don't abuse protects"

        Possible Reasons:

        I. 510 connector shorts out.

        II. The resistance of the coil you are connecting is lower than 0.1Ω

        III. Tanks/coil shorts out

    3. Can't read the resistance correctly, show "ohms too low" or "ohms too high"

        Possible Reason:

        I. Screws are not tight down.

    4. The voltage does not change while vaping

        Possible Reason:

        I. PCBA is damaged.

    Suggestions & Solutions:

        I. Please try to clean the 510 connector

        II. For the problem of resistance detection error, please take off the tank, click the fire button, and place that tank back on, click "n" when it asks "is it a new coil" (this step is to erase the resistance memory which was recorded by the previous tank)

        III. Please make sure screws are tight on the tank if you are using the RBA coil on your mod. 

        IV. In order to confirm whether it’s the problem of atomizer or mod, please try with other tanks or coils on your mod, and try the same tank on the other mods to check whether they work fine.

        V. Please set the appropriate power according to the coil’s suggested wattage.

        VI. Please make sure whether the voltage has changed while vaping, if no, please try to upgrade it or replace a new one

Pen Style (No screen battery like stick V8):

    Possible reasons

        I. Low battery            

        II. Output short circuit.

    Suggestions & Solutions:

        I. Please try to charge it for over 2 hours.   

        II. Please try with other tanks or coils on your mod, and try the same tank on the other mods to check it is tank issue or battery issue, and make corresponding substitutions.