With it empty and the top cap off turn it on and look at it. Is it bright orange? Do both coils light up?
With it empty put the top cap back on with the mouth piece in it and inhale. Does it feel restricted?
Fill it half full and give it a 7 second warm up and then inhale for 20 seconds. Do that 2 times and see if you exhale vapor.
The other night I had a little left in my grinder so the TV was half full and it still kicked my ass.
Sound advice above. If both coils glow it's almost surely putting out the 30 Watts needed. It won't get any better. Likewise, air going through is going to carry heat subject to how the user draws, the only problem I can see is too slow a rate (but you can usually pull harder for better flow). Fine enough herb that's dry enough and exposed to enough heat has to vape. It's the law, right?
Something else has to be in play, all the right pieces are here.
At the risk of repeating myself (again....) here's my system. First off, think about what you need to do. Heat herb to the magic temperature. To do so, you need to get hot air to move where you need it at the right rate and temperature. This is more like a Vapor Genie than a MFLB or any other vape you might consider using as a model.
So here's the drill I use. Fresh batteries, fine grind, dry, half to 2/3 full. Turn it on, let it heat for a LONG time, you want the heat core plenty hot, say 10 or more seconds. Then start a 'medium fast' pull. Aim to fill your lungs over 15 or 20 seconds of steady pull. The idea is to move the hot air in and through the load, it's going to take a lot of it over time, there's some metal in there too. Exhale and go again keeping the heat on. The mouthpiece should warm up and taste (but no visible vapor) should start about now. Keep at it, we still need more heat. Eventually you'll start to get real vapor, time to slow the pull to control the heat and production. Stay on the strong side of it so it doesn't cool much. This might take a third of the total battery charge until you get good at it, some guys will use weaker batteries to this point then quickly change fresh ones in for the main event. You need to shake or otherwise mix the load between hits after vapor starts or you'll never get much as only a small bit of the load will 'see' the hot air. The air will 'track' up the same route overcooking the herb along the walls while missing the bulk of the load.
You need more heat than you think you do probably. Don't be afraid of going too hot, it's easy to clean up afterward and you need to know where the limit is. Best vaping is just under that point. No vaping worth having happens much below it, only discharging batteries, still green herb and headaches. That you've got right now, right?
FWIW I think the chance of a unit that lights both sides (or even only one....) being unable to deliver vapor with proper technique is just past 'no way Charlie' on the probability scale of life. I'm confident you have a technique issue.
Keep at it, cowboy.
OF
Edit: I just saw the photo above, IMO you've got no problem. The cores are hand made (I met a couple of the owners of those very hands in fact), don't expect symmetry. What's in play is called 'the kiln effect', IR is bouncing all over in there, that's what actually heats the air, not direct contact with hot elements.
Happy vaping.
