The heater core has failed.
The blower resister is not supposed to be grounded. The smoke may be steam from a leaky heater core.
If that smoke is more like steam, you have a leaky heater core.
If it is smoke the heater fan motor has failedORElectronics in the heater have failed ORif it smells like anti freeze rather than smoke the heater core has failed.
Means that your heater core is leaking coolant. Has to be replaced.
Is it smoke or is it atomized freon leaking from the AC system? If it fogs the windshield and smells funny, you may have a leak in the AC/Heater system.
There are heater doors on the heat blower box that direct the path of the heat. Apparently the heater door to the floor vents is stuck closed.
It is probably steam coming from a leaky heater core.
SOUNDS LIKE THE INTAKE GASKET BLEW, OR THE HEATER CORE FAILED.. EITHER WAY, THIS IS A COSTLY REPAIR.
Either the a/c system is freezing up or you have a leaking heater core.............
Check the Heater Core? Did it smell like oil or antifreeze. My Heater Core went, started blowing out smoke from the vent. Most Likely the Problem. "smoke" poured into my 1991 when the ac blew out all the freon and froze up the outside temp gage.
Bad heater core.
heater fan broken.
The smoke you see may be moisture/steam. The heater core is probably leaking engine coolant. If the "smoke" has a sweet smell to it, it's engine coolant. More info about the vehicle such as model and year would help.
Probably not smoke. Your heater core may have a small leak and the "smoke you see is actually steam.Had a similar problem with an F-250 P/U. Cost about $100.00 parts and labor. But that was back in the day...
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
Could be that your heater core is leaking May also have a plugged evaporator hole.
The heater blower may not be working properly. Without the heater blower working, the air will not come through the vents.
Just a thought - - - It MAY not be smoke. You could have a pinhole leak in the heater coil which allows vaporized engine coolant to spray into the car via the A/C vents.
smoke coming from a/c vent indicates that the heater core is leaking and needs to be replaced.this smoke is hot antifreeze, it will not cause a fire but it does stink and will eventually cause car to overheat
It is for the rear heater. Press the button and this will enable heat to come out rear heater vents.
You need to check and/or replace the heater core
bad heater core under dash
the middle vents only supply air from the ac unit using a separate in dash fan. the floor and defrost vents come only from the heater