heater core
Smoke could be coming from the vents of your car for a number of reasons. You may have an internal car fire.
Shut the car off and get out. Something is broken and if its producing smoke, it could catch on fire.
Smoke travels through a confined space by following the path of least resistance. It can move through cracks, vents, and openings in walls or ceilings. The movement of smoke is influenced by factors such as temperature, pressure, and air flow within the space.
could be a leaking heater core ( Steam ) . Depends on WHAT KIND OF SMOKE. Is it steam or smoke. Smoke like something burning could be oil. electrical, etc
Means that your heater core is leaking coolant. Has to be replaced.
Sorry bad news Your heater core has a leak
The smoke is most likely a leak in prestone. Is the antifreeze level going down? OR, if the smoke has stopped, then something blew on the a/c. and now there is no more freon.
A smoke stack on a steamship vents exhaust from the ship's boiler to the air outside.
If that smoke is more like steam, you have a leaky heater core.
2 problems: Either the fan broke loose from the blower motor shaft or there is debris (usually leaves or pine needles) blocking the air entry way.
Because your jeep wrangler is over heating, you must have a sensor in the dash not working If that smoke is steam, the heater core is leaking and in need of replacement.