If you have similar question with you dab pens, please read this Yocan user's thread.
was working then began getting 3 blinking lights. cart is the one included (for concentrates). cleaned connection, loosened it, charged it.
if i put the connector on the other included cart, it works. what gives??
I think your concentrate vape cartridge is dead.
The Yocan Hive 2.0 blinks 3 times means it wont detect the vape cartridge correctly.
Please install a brand new concentrate vape cartridge