Question about 1993 Saturn SC2

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Lots air and heat, but won't blow out defrost by wind shield

My heater blows plenty of air, but it stop going through the defrost by the windshield. This just started. It there a level mechanism, which directs air?

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Similar problem on my Saturn, the air control knob is the slider above the temperature slide, it is a lever attached to a wire. It moves the vane to redirect the air, if it will not move then something is blocking the vane or the cable is jammed. If it slides back and forth without any effort then the cable as come disconnected inside. Purchase a service guide and it will explain how to remove the controls and check. It will also show where the cable attaches to the ductwork behind the dash.

Posted on Jan 08, 2009

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1998 Honda accord. heater blows good on floor and dash, but defroster does not defrost wind shield


You have to locate the vacuum motor for the defrost. It is bad or the vacuum line has come off or is broken.

Mar 06, 2015 | 1998 Honda Accord

2 Answers

My lexus rx 300 fan/ac is blowing on the wind-shield only and does not blow throuhg the instrument panel. what could be the cause?


How long have you been driving or owned a car? Your A/C is set on front "defrost" instead of main. Turn off the defroster for the front and select the switch to read "main" or if your A/C panel uses icons to display, press the one where it looks like the airflow is blowing air (represented by arrows) towards you and not the windshield. The arrows on your buttons or electronic display refer to which way the air is flowing. Choose the one you want where the arrows show the airflow is blowing out towards you and/or turn off your defroster. (If you have a knob to select airflow, turn it so it is no longer on "defrost" and it points to the main airflow blowing outward).

Feb 07, 2015 | 2001 Lexus RX 300

2 Answers

2002 mountaineer heater works, but won't blow out of the top vents that. The bottom vents work fine.


Unfortunately you are going to have to remove the dash to fix this problem. What has happened can be one of two things. The first is the ductwork has become unattached leading to the top vents. The second possibility is a damper is not working. With the engine off and the switch on, put the selector to defrost while listening closely. You should hear dampers opening and closing. If you don't, that may be the problem. They are either electrically controlled or operate off of vacuum. Hope this helps

Dec 31, 2014 | 2002 Mercury Mountaineer

2 Answers

I have a 2011 Chevrolet Equinox LTZ and my question involves the heating/ AC unit. The air flow seems to be very strong through the Defroster but for the dash vents and the floor it seems to be much s


Defrost has been stronger on all types. Just the way plenums are made. Clear that wind shield first. As long as you have plenty of heat to keep the cabin area warm to hot, it's OK. I wouldn't woory about it.

Oct 05, 2014 | 2011 Chevrolet Equinox

1 Answer

Why my A/C condenser fan won t stop running, dodge ram 2008


To clarify, the compressor and fan will run in defrost mode. The compressor and fan runs to dry out the air blowing onto the windshield.
Now if the condenser fan runs in "heat" you may have a problem with the fan relay or the main controller.

Sep 25, 2014 | 2008 Dodge Ram Pickup 1500

1 Answer

Defrost will not defrost my windshield


You do not mention the type of car you have. If you have air that blows out the defroster and panel vents you should have defrost. Do you smell a sweet odor coming from the car? This could be antifreeze leaking though the heater core. This will cause your windshield to remain foggy.

Nov 13, 2013 | Eagle Cars & Trucks

1 Answer

Long time before heater blows warm air


That seems pretty normal, the heater works by blowing excess heat from the engine coolant. So the coolant has to be warmed completely for the heat to work, you can get a heater that plugs into your cigarette lighter that will heat the vehicle instantly.

Nov 12, 2013 | 2004 Chrysler Town & Country

1 Answer

I have a 1999 Caddac DeVille . The AC works fine during the summer but in the winter it won't blow out hot air unless I'm driving. I've let the car run in the morning to warm up but the inside...


your heater core is possibly stopped up if there has been a radiator leak and stop leak has been poured its definetly clogged or could be a faulty thermostat

Jan 07, 2013 | Cars & Trucks

1 Answer

1999 durango vent control switch will not let AC blow threw vents only defrost


Usually this is a problem with the blend doors under the dash. You either have a vac leak, a dead motor, or a faulty door.
The control opens and closes the doors to direct air thru the heater core and evaporator core along with directing air thru the vents.
When a problem occurs, the default position is the defrost vents to make sure the windshield remains clear.
You can do an internet search for "repair durango blend door" for more info.

Jul 29, 2012 | 1999 Dodge Durango

2 Answers

A/C will only blow through defrost vents


Common question on this site. On late model cars, the vents are controlled by blend door motors. Small electric motors open and close doors to direct air flow.
Chances are you have a blend door that is stuck or a failed motor.
The default position is the defrost to make sure the windshield is always clear.
Someone will need to look behind the dash to see if all of the doors will move on demand.

Jun 27, 2012 | 2006 Acura TSX

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