Chrysler Sebring smoking?

waht kind of smoke? water vapor, white smoke, black smoke? what does it smell like?. maybe you have an oil of coolant leak that is going into the vents

A couple of thoughts on this.

Does the smoke have an odor? Does the smoke have a color.

Does it smell like burning plastic? Is the smoke black or dark gray? This could mean an electrical short or something electrical overheating. I once had a rodent build a nest in the blower housing on one of my cars. The blower motor could not turn. This caused smoke to come from the vents. Any smoke like this and there is a risk of fire. Have this looked into ASAP before the car burns to the ground.

Does the smoke have a sweet smell? Is the smoke white or light colored? This would be engine coolant. It would mean that you have a leaking heater core. The smoke could be steam from this hot engine coolant. Another symptom would be the windows would want to fog inside the car more than usual. This would also need to be addresses ASAP.

Does the coolant have no odor at all? Is the smoke white or light colored? This could be condensation while running the air conditioning. This would not be a serious problem. The only problem I could see from a condensation problem is that mold could grow inside the air conditioner. You would eventually get a foul smell when you use the A/C, kind of like an old used gym towel. There are products that you can spray down the A/C air intake at the windshield cowl to take care of this. You can find this at most major automotive parts stores.

i bet your car is the same thing as my oldsmobile was. i had a valve gasket leaking oil down on the manifold and when i start it and turn on the heater fan the fan would pick up the smoke from the oil burning off the manifold.

To me it sounds like the valve cover gaskets may need replacement.

They may be the source of the mystery smoke.