Vaporesso GTX One, an investigation into faults and screen messages
The device switches on, the coil is new, the tank is full, and still nothing heats up. A word in capitals replaces the wattage on the screen, and the temptation is to buy replacement coils at random. On the Vaporesso GTX One, those messages have a precise meaning, set out in the manufacturer’s manual. The trick is reading them, and telling apart what comes from the coil, the tank or the battery. This investigation traces each symptom back to its cause.
What the Vaporesso GTX One screen says when it will not fire
When the Vaporesso GTX One cuts out, it nearly always says so. Each message points to a specific protection, and most of them lead back to the coil or the tank connection rather than to a faulty mod.
CHECK ATOMIZER means no tank is detected. SHORT ATOMIZER flags a short circuit, LOW ATOMIZER a resistance that is too low and HIGH ATOMIZER one that is too high. OVER TIME appears after a puff longer than 10 seconds.
Two messages concern the battery, LOW BATTERY and LOW POWER, and they do not mean the same thing. Faults that never reach the screen (a leak, a burnt taste, buttons that stop responding) call for other checks, covered further down.
Nine protections in the GTX One manual, one message each
The multilingual manual supplied with the mod, a copy of which a UK retailer publishes online, lists nine protections. Seven show up on the screen, and two work silently while the device charges.
| Screen message | What triggers it, according to the manual | First thing to check |
|---|---|---|
| CHECK ATOMIZER | no tank detected | screw the tank and coil base back in firmly |
| SHORT ATOMIZER | short circuit detected | remove the coil, inspect the 510 pin |
| LOW ATOMIZER | extremely low resistance | check the value of the fitted coil |
| HIGH ATOMIZER | resistance too high | swap the coil or check its contact |
| OVER TIME | puff longer than 10 seconds | release the button, take a shorter puff |
| LOW BATTERY | voltage too low to start | recharge |
| LOW POWER | voltage very low during a puff | recharge |
| (none) | battery full, USB voltage too high | charging stops, try another charger |
Resistance and connection messages
Four of the seven messages concern the coil or its contact with the mod. CHECK ATOMIZER often turns up after a coil change, when the base has not been screwed all the way back. The mechanism matches the one set out in our guide to the no coil detected message.
SHORT ATOMIZER follows a different logic. The mod reads a value close to zero and refuses to send current, as our explainer on the coil shorted error describes. A brand new coil is not immune, since a manufacturing fault is enough.
OVER TIME, the ten second cut-off
This message is not a fault. The mod stops heating when the button stays pressed for more than 10 seconds, a limit the manual also gives as a usage guideline. A button held down in a pocket, with the device switched on, produces the same display.
LOW BATTERY or LOW POWER, two battery messages for two moments
The built-in 2000 mAh battery protects itself in two ways, and the manual separates them with two different words. LOW BATTERY appears when the voltage is too low to start a puff, so the mod refuses to fire at all.
LOW POWER steps in during the puff, when the voltage drops very low while the coil is heating. That second message therefore shows on a battery that could still start a puff. Either way, the only answer is to recharge through the USB-C port, at 5 V and 2 A.
On the charging side, the mod stops by itself once full, and cuts off if the charger sends more voltage than it is rated for. A charge that will not start on a fast-charging adaptor is worth retrying with a standard USB charger.
A mod that reads 0.15 to 5 ohms, a pickier GTX Tank 18
The specification page in the manual gives a resistance range of 0.15 to 5 ohms for the mod. On paper, a 0.15 ohm GTX coil therefore triggers no warning on the Vaporesso GTX One.
The tank supplied with the kit, the GTX Tank 18, does not follow that range. Two retailers, one French and one British, rule out the 0.2 and 0.3 ohm GTX coils for this tank, and the British one adds the 0.15 ohm. According to that retailer, those values call for 32 to 75 W, while the mod tops out at 40 W. A low coil that fires without a message is not necessarily a suitable one.
The kit ships with a 0.8 ohm coil fitted (12 to 20 W according to the manual) and a 1.2 ohm coil (7 to 11 W). The GTX Tank 18 holds 3 ml in its standard version and 2 ml in its TPD version, and in the UK only the 2 ml version can be sold, since refillable tanks are capped at 2 ml.
GTX One faults that never reach the screen
Some faults leave no trace on the display. They usually come down to handling, and three cases come up more than the others.
The adjustment buttons stop responding
Three presses on the main button lock or unlock the ”+” and ”-” buttons. An accidental triple press is enough to freeze the wattage, with no fault involved. Five presses within 2 seconds, on the other hand, switch the mod on or off.
A burnt taste from a new coil
The manual asks for a 5 minute wait after filling, so the e-liquid can soak into the cotton. One retailer also suggests placing 4 to 5 drops in the centre of the coil before fitting it. A puff taken too early, at full power, is enough to scorch the cotton. The same retailer recommends e-liquid with no more than 50% VG, as a thicker liquid wicks poorly.
E-liquid under the airflow ring
The GTX Tank 18 draws air through a ring at the bottom of the tank, and that is where stray liquid eventually escapes. A coil base not screwed back properly after a coil change often opens that path. The box includes four spare O-rings, to fit when an original seal is pinched or split.
What the GTX One Pro changes when diagnosing
The GTX One Pro carries the same range name, but its controls do not respond in the same way. A habit that works on the first model can mislead on the second.
On the manufacturer’s listing, three clicks open the Pro’s menu, whereas they lock the buttons on the GTX One. Locking moves to a dedicated LOCK button, a sliding switch according to two retailers. The battery rises to 3000 mAh, the OLED screen to 0.87 inch, and output still tops out at 40 W.
The tank changes too. On the Pro, the XTank T takes the GTX coils from 0.4 to 1.2 ohm listed by the manufacturer, and Smart mode only recognises GTX coils, according to two retailers. The Pro’s listing does not detail any protection, though. Only the 10 second cut-off and the CHECK ATOMIZER message appear in a manual published by a retailer.
FAQ
The questions that come up once the device is working again, about its settings, its care and its end of life.
How do you reset the GTX One to factory settings?
Pressing ”+” and ”-” together opens the system menu. The DEFAULT option, confirmed with YES and then the main button, restores the factory settings. It helps when a forgotten setting, VV mode instead of VW for instance, changes the feel for no obvious reason.
Why is the GTX One screen upside down?
The mod can flip its display by 180 degrees when the main button and ”+” are pressed together. That combination sometimes happens by accident. Repeating it puts the screen back the right way up.
What should you do with a GTX One that no longer works?
It does not go in household waste. The manual asks for the device to be taken to a collection point for electrical and electronic equipment, and its battery to a collection point for used batteries.
At what temperature should the GTX One be used and stored?
The manual recommends use between -10 and 60 °C and storage between -10 and 45 °C. It also advises against direct sunlight, moisture and dust. A mod left on a car dashboard in summer falls outside those ranges.
Can you repair a GTX One yourself?
The manufacturer advises against it. Its manual reserves repairs for Vaporesso, because of the risk of damage or injury. The box includes a warranty card, worth keeping for any claim.
Fixing a Vaporesso GTX One by reading its screen first
The right order takes only a few steps. Read the message, match it to its protection, then work on the coil, the tank or the battery before suspecting the mod itself. Silent faults are usually settled by unlocking the buttons, priming more patiently or using a thinner e-liquid.
The Vaporesso GTX One illustrates a rule that holds for any mod with a screen, and our guide to the four atomiser architectures helps choose what to screw on top. A device’s manual remains the first place to look when diagnosing it, and a message read correctly saves a good many coils thrown away for nothing.
Further reading
- No coil detected, the complete guide to the error
- Coil shorted, understanding the detected short
- Vape atomiser, the four architectures explained
Editorial content for adult readers only. Vaping products can contain nicotine, which is a highly addictive substance. Vaping products are not for sale to anyone under 18 in the UK. This article is not a buying recommendation.
