How to Use Temperature Control Mode on Your Vape

• TC reads the coil, not a thermometer. The mod measures how the coil resistance rises as it heats and uses that to work out its temperature.
• Wire type is everything. TC works with Ni200 nickel, titanium and stainless steel. It does not work with kanthal or nichrome, which is what many stock coils use.
• Lock resistance cold. Set the base resistance on a fresh coil at room temperature, before the first puff, or every reading after that is wrong.
• Start around 200 to 230°C. Adjust up in small steps. If the puff feels weak or cuts out, you are hitting the limit, not a fault.
• It stops burnt puffs, not bad wicking. TC protects a drying coil, but a flooded or poorly primed coil still needs fixing.

How temperature control works

In normal variable wattage mode your mod delivers a fixed amount of power every time you press fire, whatever is happening at the coil. If the cotton runs short of liquid, the coil keeps heating and the cotton scorches. That is the burnt, dry puff everyone knows.

Temperature control takes a different route. Some metals raise their electrical resistance in a predictable way as they heat. A TC mod measures the coil’s resistance many times a second while you fire, compares it with the cold reading you locked in, and calculates the temperature from the difference. When the coil reaches your set temperature, the chip trims the power so it cannot climb any higher.

The number that describes how much a metal’s resistance changes per degree is its temperature coefficient of resistance, or TCR. Metals with a high, steady TCR are easy for a mod to read; metals with a TCR close to zero give the chip nothing to measure.

Which coils work with TC mode

This is where most people go wrong. TC only works if the coil is made from a wire the chip can read, and your mod has to know which wire it is.

Coil heads are labelled with their resistance and usually their wire. If the packet says kanthal, KA1 or nichrome, keep that coil in wattage mode. If you are not sure what your coils are made of, check the product listing or the manufacturer’s site before switching modes. Stainless steel is the friendliest choice because it behaves sensibly in both modes.

Resistance also matters. The Eleaf iStick 40W TC Box Mod lists a temperature control range of 0.05 to 1 ohm and supports nickel coils for TC, while the Smok Species 230W TC Kit lists a 0.05 to 2.0 ohm TC range with titanium, Ni200 and stainless steel settings. Both cover 100 to 315°C. Outside the TC resistance window, the mod will either refuse TC or drop back to wattage mode.

Setting up TC mode step by step

Menus differ between brands, but the sequence is the same on every TC mod. Do it with a new coil, fitted and primed, at room temperature.

1. 1
   Fit and prime a TC-compatible coil. Drop liquid onto the exposed cotton, fill the tank and leave it five to ten minutes. Do not fire it yet.
2. 2
   Screw the tank on and let the mod read the coil. Most mods ask whether this is a new coil. Say yes, so it takes a fresh cold reading.
3. 3
   Enter the mode menu and choose the wire. Pick Ni, Ti or SS to match the coil. Your manual gives the button sequence for the mode menu.
4. 4
   Lock the resistance. With the coil still cold, lock the reading. A resistance taken on a warm coil makes the mod think it is cooler than it really is.
5. 5
   Set the temperature. Start around 200 to 230°C. Take a few puffs, then move up 5 to 10 degrees at a time until the flavour peaks.
6. 6
   Set a power ceiling if your mod has one. Many TC mods let you choose the wattage used to reach temperature. Keep it close to the range printed on the coil.

If your mod has a TCR mode and your wire has no preset, enter its coefficient there using the manufacturer’s figure. Our guide to what’s inside a vape mod explains how the chipset and 510 connector read the coil in the first place.

Finding the right temperature

Lower temperatures give cooler, lighter vapour and a softer flavour. Higher temperatures give warmer, denser vapour and a stronger taste, up to the point where the cotton starts to suffer. Most people settle somewhere between 200 and 250°C.

The puff feels weak or pulses. The coil is reaching your set temperature quickly and the mod is throttling it. Raise the temperature a notch, or raise the power ceiling so it gets there more smoothly.

The flavour is muted. Often the temperature is simply too low for the liquid. Thicker, high-VG liquid usually needs a little more heat than a 50/50. Remember the basic match: 50/50 suits MTL coils of 0.6 ohm and above (typically 0.6 to 1.2 ohm); high-VG 70/30 suits coils below about 0.6 ohm. The guide to PG/VG ratios has more.

It still tastes burnt. TC cannot fix a coil that is already scorched, and it cannot fix a coil that was never primed. Swap the coil and prime it properly. Our guide on why a vape tastes burnt covers every cause.

Common TC problems and fixes

A resistance reading that creeps steadily over the life of a coil is normal wear. Re-lock only when you fit a new coil, not every time you pick the mod up. Keep the 510 connection clean; a sticky pin causes more strange TC behaviour than any setting. Our guide to vape maintenance has a simple routine.

Coils still need replacing on schedule in TC mode. Typical sub-ohm heads such as the Voopoo PnP coils or the Vaporesso GTI coils list their wire and resistance on the packet, so check that before choosing a mode. Browse the full replacement coils range to find heads for your tank.

Is temperature control worth using?

If you rebuild your own coils in stainless steel or nickel, or you vape sweet liquids that tend to scorch cotton, TC is worth ten minutes of set-up. It gives the same temperature on the first puff and the fiftieth, and it takes the edge off a coil that is starting to run dry.

If you use pre-made kanthal or mesh heads and you are happy in wattage mode, you are not missing anything important. Plenty of experienced vapers never touch TC. Keep your wattage inside the range on the coil and you will get most of the benefit anyway.

TC is a mod feature. Most pod kits and all-in-one devices run in wattage or automatic mode only. If you are still choosing hardware, see the best box mods in the UK, compare complete advanced kits, or read the mistakes to avoid when switching to an advanced kit. Browse all box mods if you already know what you want.

Find a mod and coils that suit TC

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