Heating hoses are exposed and need to be replaced.
The heater core is leaking coolant.
The steam could be coolant from a bad heater core.
Since steam is water evaporating, water that becomes steam may not be clean. So, when the steam goes thru, some of the dirt may come off along with the steam when the steam becomes water.Creating deposits in the steam vents.
This is caused by a faulty heater core that has corroded and now has a leak. It needs to be replaced.
Antifreeze will be leaking in the floorboard on the passenger side, there will be a smell of antifreeze through the vents.
Vents in the volcano are passage ways for the magma, steam, and heat to escape the earth.
The heater coil probably has a leak causing steam and vaporized antifreeze to be released into the vents. Is it using coolant?
heater core needs replacement
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
The heater core is leaking coolant.
The little vents (or flaps) inside the heater system are stuck, broken, lost power (they're vacuum motors).
If the vents are inside the cab of the truck, this could mean you have blown your heater core.
heater core or the hoses in the engine compartment goin 2 it. remove the cowl under the windshield wipres, under that is a cavity that leads to your vents. if the drain hole is plugged you will get water in your floorboard comming threw the vents. if the car has a sunroof it's likely that the drain tube is either clogged, split or has detached.