Quick answer
A vape cart that stops hitting has one of six causes. In order of frequency: a discharged battery, a clog in the mouthpiece or airway, oil on the battery contact, a voltage setting below the oil's range, an empty tank, or a burned coil. Work through them in that order. Most carts return to service after the first four steps.
Step 1: Charge the battery
Put the battery on its charger for 45 to 60 minutes. On most 510-thread batteries, a button that blinks 3 times on draw means low charge. Draw-activated batteries show a light in the body during a pull. No light means no charge. A 350 mAh battery drains faster at 4.0 volts than at 2.8 volts.
Step 2: Test the draw
Remove the cart from the battery. Pull on the mouthpiece for 3 seconds. Free airflow means the airway is open and the fault sits in the battery or the coil. Resistance and no air means a clog.
Step 3: Clear a clog
Oil collects in the center post and the mouthpiece. Warm the cart in your hand for 2 minutes, or run a preheat cycle for 10 seconds at 2.0 volts to 2.4 volts. Then pull again. Do not push a needle, pin, or paper clip into the airway. Metal can crack the glass and damage the coil. Wipe the mouthpiece threads with a dry cotton swab.
Step 4: Clean the contacts
Oil and dust block the connection between the cart pin and the battery pin. Swab both pins with 91 percent isopropyl alcohol on a cotton swab. Let them dry for 60 seconds. Screw the cart on until it sits flush. Do not over tighten. Excess torque pushes the battery pin down and cuts contact.
Step 5: Check the voltage
Distillate and live resin oils run at 2.5 volts to 3.3 volts. Rosin and thick oils run at 2.0 volts to 2.6 volts. Settings above 4.0 volts scorch terpenes and the cotton wick. A burned wick tastes like scorched paper and stays burned. Voltage that is too low produces thin vapor, not a dead cart.
Step 6: Check the oil level and the coil
Hold the tank against a light. Oil below the intake holes on the coil means the wick runs dry. Stand the cart upright for 15 minutes so oil settles over the intake. Dark brown oil at the bottom has oxidized or been heated many times. That oil feeds the coil at a slower rate and tastes harsh.
Step 7: Swap one part at a time
Move the cart to a second battery. Move a known working cart to the first battery. This separates a battery fault from a cart fault. A cart that fails on two charged batteries with clean contacts is dead. Replace it.
Storage and handling
- Store carts upright at 60 F to 70 F (15 C to 21 C).
- Keep carts out of cars. Heat thins oil and pushes it into the airway.
- Pull for 3 to 5 seconds. Long pulls heat the coil past the oil feed rate.
- Do not leave a cart on a battery in a pocket. Button presses fire the coil.
When to stop using the cart
Stop if the vapor tastes like burnt rubber, if oil leaks into your mouth, or if the cart came from a seller without a license. CDC lab testing found vitamin E acetate in lung fluid samples from EVALI patients and tied the compound to THC cartridges in the 2019 to 2020 outbreak. That outbreak produced 2,807 hospitalizations and 68 deaths. Vitamin E acetate is a thickener, not a diluent, and it does not belong in an inhalable product.
Licensed dispensary carts carry batch test results for potency, pesticides, heavy metals, and residual solvents in states with testing rules. Keep the package and the batch number. The label lists the oil type, the fill weight, and the production date.
FAQ
Why does my cart hit after a charge and then stop?
The battery holds a small charge. A 350 mAh cell delivers fewer draws at 4.0 volts than at 2.8 volts. Carry a charged spare.
Can I fix a clog with heat?
Yes. Body heat and a 10 second preheat cycle thin the oil enough to clear the center post. A hair dryer on low, held 6 inches away for 20 seconds, does the same job. Do not use a microwave or an oven.
Does a low battery cause weak vapor or no vapor?
Weak vapor. A cart with no vapor at all points to a clog, a dirty contact, or a broken coil.