Question about 2001 Dodge Grand Caravan

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Air Conditioning Fog

My front vents ocassionally blow a fog from only the center vents when the ac is on. No other problems except the force of the air coming from the vents changes intermittently. Sometimes it will not blow forcefully. My engine light is also on for a very slight emissions leak. Related? I have also been told there is a very small transmission fluid leak. Is this all related or seperate problems. I know nothing about this type of stuff.

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  • Anonymous Mar 31, 2014

    AC front glass working with loud noise and no air comes out

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Does the fog smell sweet. if ti does then you have a leak in your heater core. if a/c compressor is comming on/off rapidly or not engaging at all then you have a leak in your evaporator core.

Posted on Dec 06, 2008

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Posted on Jan 02, 2017

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2005 Jeep Liberty Windshield keeps foging up what would cause it to do that. AC was blowing cold and stop then fog started coming out of the vents.


fogging inside a car out of vents
with aircon happens sometimes

nothing wrong with the air con system at all .....fog will clear

scientific cause ...cold air hits hot air
the internal temp of the car is higher than the external temp
or other way round
causing fog

Oct 10, 2016 | Jeep Cars & Trucks

Tip

Tips for operating Air conditioning system on Toyota Hilux and someother...


To cool off your Toyota after it has been parked in the hot sun, drive with the windows open for a few minutes. This vents the hot air, allowing the air conditioning to cool the interior more quickly.

Make sure the air intake grilles in front of the windshield are not blocked (by leaves or snow, for example).

On humid, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

Keep the area under the front seats clear to allow air to circulate throughout the vehicle.

On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows.

When driving on dusty roads, close all windows. If dust thrown up b the vehicle is still drawn into the vehicle after closing the windows, it is recommended that the in intake be set to FRESH and the fan speed to any setting except "OFF".

If following another vehicle on a dusty road, or driving in windy and dusty conditions, it is recommended that the air intake be temporarily set to RECIRCULATE, which will close off the outside passage and prevent outside air and dust from entering the vehicle interior.

HEATING

For best results, set controls to;
Fan speed ---- Any setting except "OFF"
Temperature----Towards WARM (red zone)
Air intake ---- FRESH (outside air)
Air flow ---- FLOOR
Air conditioning ---- OFF

For quick heating, select recirculated air for a few minutes. To keep the windows from fogging, select fresh after the vehicle has been warmed.

Press the "A/C" button on for dehumidified heating.

Choose floor/windshield air flow to heat the voltage interior while defrosting or defogging the windshield.

AIR CONDITIONING

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

For quick cooling, move the air intake selector to recirculate for a few minutes.

VENTILATION

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

DEFOGGING

The inside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone) to heat; COLD (blue zone) to cool
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- ON

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

On humid days, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

DEFROSTING

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

To heat the vehicle interior while defrosting the windshield, choose floor/windshield air flow.

on Feb 14, 2011 | Toyota Pickup Cars & Trucks

1 Answer

Air vent schematic


air for the inside of the car comes from the vent at the base of the windscreen or is recirculated inside the car
if you see what appears to be mist, fog or smoke from the ac vents ,it is extra cold air from the ac system that is seen as fog when it hits the air in the car
you will know exhaust fumes by the smell

Nov 18, 2015 | AC Cars & Trucks

1 Answer

I drive c240 2005, when i turn the front glass fog air blow on, it give loud noise and now air comes out, it seems that pips are blocked somewhere.. NOT SURE WHAT TO DO


Do you mean that the air does not come out of the vents at the bottom of the windshield?

This could be as simple as a vacuum leak or a broken leaver somewhere in your dashboard. I'm a big fan of fixing it yourself but I think this one is going to be easier for a dealer to fix.

Mar 31, 2014 | Mercedes-Benz C-Class Cars & Trucks

1 Answer

Hi just got an audi a4 2001, 1.9tdi 130bhp, the windows keep fogging up and there doesnt seem to be air coming out of the vent for the front windscreen??? can anyone help??? the back windown is fogging up...


Windows fog up because of the humidity in the car. Run the ac and this removes the humidity from the air and the windows will not fog. If you do not have air flowing from the vents then check that the selection control is moving the vent doors . Check that the vacuum line is connected and not broken.

Oct 04, 2013 | 2001 Audi A4

1 Answer

2005 chevy silverado steam through air vents


Probably fog.
Either the ac is not draining onto the ground, or the system is cutting on and off too much, or its not letting in enough fresh air. The fog would be from moisture inside the hvac box.

Jul 17, 2013 | Cars & Trucks

1 Answer

The air conditioning blows out of the defrost vents. It only works on high now but use to on low. It use to come out of the front vents ocassionally. We did replace the heater / air control unit in the...


Seems like the dampers are partically closed,look under steering column and see your duck work for the vent system.Follow it back to the blower box.Unhook if there, turn on ac, if you get full air, nice and cold on low and high you have blockage in your vent duct work,check the vent line that diverts air to the diffrent selected vents. Also check for vent disconnection around sterring column,and defrost vent area.

Jul 14, 2010 | 1995 Jeep Grand Cherokee

1 Answer

Warm fog comes out air conditioning vents although AC is cooling very well.


If you live in an area of high humidity this is a normal occurrence vent your rear windows to allow the humid air out till the fog dissipates then close them and set the AC to recirculate.

Aug 11, 2009 | Ford Expedition Cars & Trucks

1 Answer

When I turn my vent selector to defrost on the far right (air con off)the air conditioning comes on. The dash vents will blow ambient air, but defrost setting blows air con. Any ideas?


It's normal for the A/C compressor to come on with the defroster to dehumidify the air so the windsheild won't fog up under humid conditions. You can still control the air temp. out the vents with the temp. select switch.

Jul 19, 2009 | 2005 Jeep Wrangler

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