A device that lights up and fires but produces nothing — no vapor, no hit — is a different problem from one that's completely dead. Since the battery and circuit are clearly working, the cause almost always sits somewhere between the coil and the airflow path, and it's usually one of a small handful of things.
Too much e-liquid pooling directly on the coil — from overfilling the tank, or drawing too gently right after a refill before the wick has settled — can prevent proper vaporization even though the coil is firing correctly. A few gentle draws without inhaling, letting excess liquid clear, often resolves this on its own within a minute or two.
If e-liquid has dropped below the wicking ports, the coil fires against a dry or nearly dry wick. Counterintuitively, a very gentle draw on a dry coil sometimes produces almost nothing rather than the harsh burnt taste you'd expect — it's worth checking the actual liquid level before assuming the hardware itself is at fault.
Debris in the airflow path, a stuck or misaligned airflow ring, or a clogged drip tip can restrict airflow enough that vapor isn't being pulled through properly even though the coil is heating normally. Checking that the airflow ring turns freely and the drip tip is clear is worth doing before replacing anything.
A coil that isn't screwed in fully, or one genuinely near the end of its life, can sometimes trigger the device's indicator light without properly completing the circuit needed to vaporize liquid. We cover coil lifespan and the signs one needs replacing in more depth elsewhere — if reseating the coil firmly doesn't help, a fresh one usually does.
Some devices display a normal-looking indicator light even once battery voltage has dropped below what's actually needed to heat the coil to a proper vaporizing temperature. If the device hasn't been charged recently, that's worth ruling out before assuming a hardware fault.
No — repeatedly firing a coil that isn't vaporizing properly (whether dry or flooded) tends to shorten its life further. Address the likely cause first, then try again.
Not typically on its own, but it's worth clearing rather than working around, since restricted airflow can also mask other issues (like a coil not seated correctly) that are easier to catch once airflow is confirmed clear.
Swapping in a fresh coil is the fastest way to isolate the problem — if a new coil fixes it immediately, the old coil was the cause; if the issue persists with a fresh coil, the tank or device itself is more likely at fault.
Before you replace anything, it's worth checking current Everything For 420 coupon codes — every code listed is tested against checkout and dated, not just pulled from a feed.