Follow these steps to fix the “check atomizer” error:

1. Clean the atomizer connector pin
   Start by cleaning the connector (or pin) in your atomizer with some paper towel. Carefully remove any visible residue.
   
   
2. Clean the battery pin
   Use paper towel to clean the part where the atomizer pin screws in. You want to remove any e-liquid and or other residue there. Cleaning this thoroughly also means that there’ll be better conductivity between the various parts of the e-cigarette.
3. Check that all parts of your e-cigarette are screwed together tightly
   Check that your atomizer is firmly screwed to the battery. If they are loose this can cause an error message. But don’t over tighten them or you risk blocking the parts in between them.
4. Check that your coil is positioned correctly
   Make sure the coil is correctly seated. Take it out and put it back in, just to check. We’d also recommend changing the coil if the message keeps appearing.

Time for a good clean and some checks

Most of the time, the reason for this problem is very simple. It’s because the electronic device, whether it’s a mod, box mod or a pod, can’t connect with the top part of the e-cigarette, i.e. the atomizer.

To try and fix whatever’s triggering the “check atomizer” message on your e-cigarette, follow the steps explained at the beginning of this article.

If you’re still seeing the “check atomizer” message after you’ve tried them all, try replacing the coil with a new one. Sometimes coils have design faults so they don’t work properly. Finally, if the message continues despite your best efforts, try fitting your battery to a different atomizer.

Battery error

Your box might also display a message that reads “battery error”.

If this happens, first try cleaning the battery contacts and the contacts inside the device that connect to the battery (if the device has a removable battery). Additionally, use the "reset" function on the device to restore it to factory settings.

So, if your box has a removable battery (e.g. a 18650 type), just replace it. 

If the problem persists, unfortunately, you will have to send the device for repair or replace it for a new one.