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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

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โˆ™ 2015-07-17 17:38:39
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Q: Why would the AC and heater blow air through the defroster or the floor vents but not through the dashboard vents?
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Related Questions

Why would the ac and heater blow air through the defroster or the dashboard vents but not through the floor vents.?

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.

Why do you have antifreeze on the floor of your car?

You have a leaking heater core. You might smell antifreeze if you turn on the defroster.

What do you look for in having the blower blow to the floor and through the vents. Currently no matter how you adjust the AC or heater control it blows through the defroster by the windshield?

your switch cable might be broke you will have to remove your dash

Why does your car heater smell?

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.

Why is the Right passenger car floor wet no rain?

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.

Where would your 95 ford explorer leak if the heater core is no good?

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......

You have a 2004 RAV4 and when using the defroster and heater water drips from the engine compartment as if the AC has been running The dealer said this was normal but you have never noticed this befor?

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.

Why would hot air come out of the defroster and vent work but not the heater on 95 S10 blazer?

What causes heat to only come out of the defrost and vent but not the floor of a 1995 S10 Blazer?

What are the signs of heater core going out in 98 s10?

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 gets in your car everytime it rains and you dont know where it comes from?

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.

Blower works but can not control blower to panel defroster or floor?

Check your servos.

Why do you get hot air at floor and defroster vents but only cold air at the dash vents vents in a 1995 chevyvan 20?

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

What would cause water to leak on the passengers side floor?

busted raditator , check heater-core . most are found inside up under your dashboard . hope that helps you !

Why would a 1999 Dodge 2500 Diesel have little to no cab heat when the fan is moving lots of air through defroster vents and floor vents?

Low coolant level? Thermostat opening too soon? Plugged or restricted heater core? Water pump not circulating coolant? System airbound?

How do you know if a heater core is bad in a 1997 Cherolet S-10?

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.

Why does a 2003 dodge caravan se front passenger side floor board is wet?

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.

Why is water on the front floor of the car?

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.

Why does the interior of a car fog up even if ac blower and heater core are working properly?

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.

Why is your 1990 ford tempo loosing antifreeze through the dash and floor and the heater no longer works?

Sounds like your heater core is bad and your engine is low on coolant

How do you get water to stop coming through the floor vent of a 96 neon?

Sounds like the heater core is leaking!

Why would water be seeping into the cab through the floor right in front of the passenger seat?

heater core leaking

What is a mode door on a 2000 Dodge Intrepid?

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.

Where is alarm on a 2001 Ford Escape?

Behind the dashboard on the floor

Are electric floor heaters safe for my home?

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.

Where is located heating element in acura integra 1995?

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.