You may have a leaking heater core but before you replace it check the heater hoses because sometimes coolant can pass under a loose hose clamp..........
If it smells sweet ,it is coolant, and the heater core has failed. If it smells electrical you have a wiring problem and need to remove whatever is necessary to find cause.
The air conditioner is low on refrigerant.
The most common thing will be that you have a leaking heater core...........
is your fan running in the correct direction? are any of your ducts blocked?
AnswerWater vapor will sometimes exit your car's vents when hot humid air passes through the A/C cooling system too fast for the condensing moisture to form into water droplets. This can be resolved by selecting recycled air from inside the car, but the vapor is not harmful and usually doesn't last long.
If it doesn't smell like smoke it could be comdensation off the evaporator core. You might have a clogged evap. case drain. If it is left unchecked it will start to smell moldy. If it is smoke, it usually be gray or black due to melting wires(also stink), afaulty blower bearings( would make noise).
This has much to do with how the air conditioner and the heater is vented. If the air conditioner draws its air from outside it could be picking up air / smell of smoke from the other family and then redistributing it into your home. A heater on the other had usually has a heater input vent within the house it is heating (it draws the interior air in and then heats it blowing it back out) as the air within the home will be significantly warmer than the exterior air.
White smoke with the a/c on means that the a/c system is freezing up and you need to check the pressure switch........... White smoke with the a/c off means that you have a leaking heater core........
There is smoke coming from the chimney atop Petey's Pub. Stand on the cover there for a minute to partly block the smoke. Then the parrot can be found in the palm tree to the far right.
excessive humidity.
no
is it possible that the vent hose are disconected?