Because there is a vaccume leak @ the reservoir or the hoses going 2 the reservoir There is a small,main vaccume hose from the intake manifold that supplies VAC 2 the AC system.The hose is usally 1/8 0r 3/16 in size.Older fords have a tank that looks like a fruit juice can for a reservoir.U have 2 have Engine VAC @ the AC Controls 2 work.If a hose or line is Cracked,the AC will usally blow out the dash only when not under acceleration.when u ACC the air will go 2 the floor.There could even B a hose off under the Dashboard. Some cars or trucks have small rubber hoses or small plastic hoses with rubber conections going 2 the intake manifold.
Glenda, most systems use either mechanical or vacume to operate the vent doors on the airflow ducts. You either have a vacume leak or the mechanical lever needs adjustment. . John In Montana
It should blow through the floor vents. Modern vehicles generally use movable baffles in there HVAC systems, to direct air flow where the controls indicate. If the controls allow airflow to the floor, but nothing flows out, there is a malfunction between the control switch and the actuator that directs the flow.
You have a leaking heater core. You might smell antifreeze if you turn on the defroster.
your switch cable might be broke you will have to remove your dash
If the heater has a sweet smell it could be that the heater core is leaking engine coolant. When the leak gets worse you will have a wet floor on the passenger side and the windshield will fog up when you turn on the defroster.
You didn't mention what vehicle you have but in most vehicles the heater core is located under the dash on the passenger side. The heater core is known to spring a leak and show up on the passengers floor. Turn on the defroster and see if your nose senses the sweet smell of radiator coolant. The inside of the windshield my fog up when the defroster is turned on, this would also indicate a leaky heater core.
On the passengers side floor board or if the heater core just has a small crack then it will fog up the windshield when the defroster is turned on and smell very bad......
it is normal. when you use the defroster, the air conditioner is also working to help dry the air passing over the windshield. this moisture is condensed by the cool evaporator and drained through the floor of the car.
What causes heat to only come out of the defrost and vent but not the floor of a 1995 S10 Blazer?
Finding coolant on the passengers side floor. Turning on the defroster and the inside of the windshield fogs up. Sweet smell of coolant inside vehicle.
Water can get in when the firewall flashing is missing outside under the windshield cowling. The water gets into the heater/defroster system and then drains on to the floor.
Check your servos.
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
busted raditator , check heater-core . most are found inside up under your dashboard . hope that helps you !
Low coolant level? Thermostat opening too soon? Plugged or restricted heater core? Water pump not circulating coolant? System airbound?
Typically the front passenger side floor/carpet gets soaked with engine coolant and when you turn on the defroster, the inside of the windshield fogs up.
I have a 2003 Town and Country. I had the same problem - passenger floor being wet. Problem - your heater core is leaking. The heater core typically drains onto the ground through a small drain hose. Your heater core is leaking at the mechanism which is located under the dashboard on the passenger side. You can pull the carpet back and look up under the dash and see the heater core housing, and also confirm the origin point of the leak. I live in Florida and don't use my heater. Therefore, I capped the heater core. Any local repair shop can explain how to do this. If you need your heat and can't live with wet floor, you will need to have it fixed.
It is probably the heater coil. When it stops working water from the radiator goes back through a hose and when it overfills it emptys into the passenger side floor. You can replace the heater coil or bypass the hoses. Second option will cause heater to stop working.
I have had this happen on a number of my cars as they get older...each and every time it was due to small leaks developing in the heater core, leading to heavily moisturized air being blown through the defroster, rather than the dehumidified air that the A/C would generally create. (Yes, the AC runs when you're in defroster mode, even if you have the heat set to high...this is deliberate because the AC tends to remove moisture from the air.) Check your floor carpets, especially up near the drivetrain hump and front of the passenger footwell. Damp? You have a heater core problem. Solutions: None easy. The heater core on most modern cars and trucks is generally difficult to get to. Since this has happened to me on OLD cars that I would use and not my wife, I would generally bypass the heater completely, running the water intake hose to where the water return hose attaches to the engine. But then you have no heater or defroster at all. Brrrrr.
Sounds like your heater core is bad and your engine is low on coolant
Sounds like the heater core is leaking!
heater core leaking
I think your refering to the door in the heater housing that directs air to vents, floor or defroster vents, there is also a blend actuator that mixes heated or cooled air to give the correct temperature from the selector.
Behind the dashboard on the floor
As long as you buy a floor heater that was made recently, you should be okay. If you were to buy an old used floor heater, I would be cautious. Whenever you use a floor heater however, you need to put it in a safe place and never leave it on if you go out of the house.
behind the dashboard near the floor. turn on the fan and feel near the gas pedal for the air. Then just follow it to where it is coming from. This will be the heater box. Inside is what you look for.