Air Only Blows Out Of Defrost Vents

DIY 1$ fix for the air been blowing from the defroster vents: Air con blowing out of defrosters and not through the vents: A/C blows through defrost vent: A/C, Heat, Fan, etc only blows out defrost vent: The heater/ac only blows out the defroster vents. Battery was replaced by Sears, only now the Air Conditioning and outside vent air only blows at the bottom and defrost vents on dash and sides but never through the front passenger and rear passenger vents. 2wd 2001 ranger single cab 2wd 2. No matter what setting it's on, or speed, it all comes out the defrost vents. The air is only blowing out the defrost vents because it is a default mode. However; I noticed on the Heat/Defrost Door Actuator, the Door Pivot Connection was disconnected. Not a blend door problem. If you want just outside air to flow through the vents, it's forced air from outside. Is this normal or anyone have a solution? Thanks. A few minutes later, it stops blowing out of the vents and blows out of the defroster. The air only blows out of the defrost vents onto the windshield. Subject: Vent Control question IP: Logged Message: Ive got a 95 dakota, and the vent control only allows air to blow out of the defrost vents. Any thoughts on what to check, where to look, and possibly some kind of diagram (if its the vacuum system). 1990 190e 2. If it's working on 1/2/3 for a little while, and it varies how hard the air comes out of the vents, then the Blower Motor Resistor is on its way out. Similar to the other post on here, my HVAC system is stuck in defrost mode. With each change of the AC/Heat/Defrost switch on the dash, I can see a corresponding move of the actuator. My 2012 Jeep Liberty's air conditioning is only blowing out of the defrost vents not anywhere else. The vents facing me are dead. They said that the blend door actuator wasn't working. I looked under the drivers side of the dash tonight and it looks like the blend actuator is operating correctly. I understand hat the default is to have the air blow out the defrost, how do I lock that out?. Before replacing Heater Control Unit, it would only blow hot air from front vents- With this replacement it will now change from cold to hot and the air flow pressure does change from the front vents when changing the setting. After installing a new blower fan motor the ac would only come out the defrost vents. 5l X-type seems to only blow hot air when the heater is set to windshield defrost. When I move the switch over to floor vents it still comes out the dash vents. My son's '97 ZJ blows cold air, but it only comes out of the defrost vents on top of the dash. I noticed that the cold A/C blows out of the defrost vents against the windshield even when the defroster is set to off. If you have cold and hot air, But it only blows out the floor vents, then the "nipple" replacement fix most likely will cure your problems. The air conditioner blows cold air but it only comes out of the floor or defrost, not the front vents. Re: Only the defroster works! there is a vaccumn accumalater that controls everything other then the defroster. Air automatically only goes through the defrost and feet at all times. There is simply no air coming out of the middle tubes at all. Air/Heat only blows out of vents on top of dash - Page 2 - JeepForum. Air only blows out of front vents (not from bottom heater or defroster) on 2002 Buick LeSabre I am only getting air to come out of the front vents of the dash. My heater won't switch between defrost, floor heat or vents. Fuses were checked at the engine compartment and under the rear seat. Air only blows through defrost vents not front vents in my car? Today i noticed my air was no longer blowing out of my front vents where the A/C is supposed to blow out of, instead it was blowing out of the defrost vents along the windshield. If after you loose vac air only comes out the defrost (and leaks out of a couple of other vents), then your 87 is probably the same setup and it is having a vac issue. Air only blows through defrost vents, cannot change heater settings, Escalade, Avalanche, Silverado, Suburban, Tahoe, Yukon, TSB, #04-01-38-008 GM has issued a technical service bulletin (TSB) #04-01-38-008 to address problems with the heating system, blower control, and airflow on the following models:. From: Message: wildbill Dodge Dakota JOIN HERE 8/17/2005 14:55:36: Subject: AC/heater only blows out defrost vents IP: Logged Message: 97 Dakota all of a sudden started only blowing out the defrost vents on all position settings. Sometimes, if I move the knob to the defroster and back, it will work again, but that doesn’t work all the time…help, please!. There is a resistor pack on the unit outside in the generator compartment. Sep 9, 2008 at 11:30 PM #1. Any help is appreciated. Being in Arizona, it will be 100'+ for the next 4 months, I do not need the defroster. AC/Heater air only blows out defrost and far left/far right ventWhy?? 04-25-2017 11:01 AM #1 So when I turn on the blower fan and no matter where I put the ac/heater selector the air only blows out the defrost vent and the outer edge dash vent swhat makes it do this and how to I get airflow thru the center dash vents. After moving the doors for the 10 minute drive to work it slowed down. The heater vent fan works, but only on the two highest settings, which is not a big problem. I'm assuming theres just a mechanical linkage somewhere behind the interface thats broken, but I haven't taken it apart yet. There were two vacuum lines near the heater box that were hanging loose. This Sierra has auto a/c controls and no floor mounted center console. The fan speed works fine, and the AC will come on and make the air cold or hot, but no matter where I put the vent selector, I just get air from the defrost. cold air only out of defrost vents did you ever find the vacum hose that defaults the cold air thru defrost vents only? was the hose on the right front fender? what year is your expedtion? thanks and did it solve your problelm?. Any help is appreciated. Air blowing out of the defrost vents only, 30,000 2007 ford explorer 4WD 6CYL, i've tried to look up information on how - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. air only blowing through defrost 5 Answers 2015 Taurus digital dash, all air only blows on defrost. I am about at whits end. Similar to the other post on here, my HVAC system is stuck in defrost mode. Nothing happens when the switch is thrown to direct the air through the dash or floor vents. And you can adjust how much air and the temperature as well still. Is this true or should I find another mechanic. The vacuum line that controls which vents receive air comes in from the passenger side firewall just north of the battery. Air came out only at the defrost vents when I got it (at age 16). AC stuck blowing only out Defrost Vent I have a 2005 Magnum and just last week, I set the ac to flow out the Defogger to clear up some fog on the windshield, and now I can not get the AC to flow out of any other vent with the switch. On top of it all i ended up taking the entire dash apart and out of the truck down the metal base support only to find and realize that the defrost and the normal heat worked perfectly, but the vent door( wish is the simplist and easiest to get to) was the only thing broken. For some reason my truck has recently started only blowing air/heat through the defrost vents, should i check for fuses or what? Black 2000 5spd 5. We had a radiator replaced over the summer the air works fine but now even if we let our car warm up and drive it all day the heat never blows out hot it's always cold the other day I noticed when the heat was completely turned off but it was on defrost and it was blowing a little warm but as soon as I turn the heat on it got cold again I'm. Thanks, I found the vacuum hoses, I pulled the trim from the center of the dash and pulled the AC controls out. I can go a week without being able to switch from main vent to floor and mains to defrost but eventually it gets stuck on the main vents. I noticed that the cold A/C blows out of the defrost vents against the windshield even when the defroster is set to off. It's worth a try. This 1996 Chevrolet S10 came in with the complaint that the heater/ air conditioner air only blows out of the defroster vents regardless of where it is commanded. Here is what. This Sierra has auto a/c controls and no floor mounted center console. Air was blowing from dash vents while he was driving then all of a sudden it started blowing out of the defrost vents. Can't get anything out of any other vent. It only works on the front vents and floor vents. Fan motor works fine, Tem switch works fine, but the other is stuck blowing out in defrost no mater which vent you turn to. Air came out only at the defrost vents when I got it (at age 16). Grand Marquis - Air blows out wrong vent - I have a 2004 Grand Marquis with ATC. Is this electrical or vaccum? Where do I start?. Now I'm really. When you say the vents do not open, I am assuming you mean no air comes out the vents, but does come out the defrost and floor vents ok. the blend door is what controls hot/cold air, by blending how much goes thru the heater core. how do I FIX IT. My heater won't switch between defrost, floor heat or vents. If air blows strong, you may only have a failure in the pod 38, short-throw port. When i start the car up it cycles through the floor board, then the normal face vents and then ends up only blowing from the defrost. I'm wondering if something is simply stuck or if it's a bigger issue? Ford F350 AC Only Blowing Through Defroster Vents - Automotive Repairs - DIY Chatroom Home Improvement Forum. There are several vacuum hoses of different colors. If I select "vent" on the controls, the air comes out of the dash vents but does not go through the AC coils. The heater blows hot air and the AC blows cold air but it will only come out of the dash, no other place. but it only blows out of the defrost vents. Then I proceeded to watching each actuator while someone ran the controls and all actuators worked which leads me to believe that I have good vacuum on all of them. your going to have to remove the lower cowling of the dash on the passenger side analso some of the center. Heat works fine if I turn up the temp, if I turn it down, the AC works fine, I can tell the recycle works, outside air works you can hear the difference and increase in flow for recycle and a little bit of temp change on outside air, but it will not send the air out the dash vents, or floor no matter what mode setting I select. When the vacuum line breaks it's designed to default to defrost. No matter what position the dial is on the air refuses to blow through the front vents for the driver and passenger. If I let up on the gas pedal for a few seconds it will return to the dash vents again. Setting the heater at around 23 degrees C, the air coming out of the top vents is very warm/hot (i. So if I turn the AC on it will eventually blow cool air through the defroster vents while I'm driving, if I come to a stand still the AC air coming. No Air Coming Out Defroster Vents. Adjusting the blower settings does no good. But this worked for me: 1) Unplug HVAC fuse for 10-30 seconds 2) Start truck 3) A/C comes out defrost - wait about 10 to 15 secs. Being in Arizona, it will be 100'+ for the next 4 months, I do not need the defroster. When i start the car up it cycles through the floor board, then the normal face vents and then ends up only blowing from the defrost. Does anyone have any idea what this could be? Thanks. I have a 04 silverado 1500, and the ac will only blow through the defrost vents. Mine was broken completely off with just a nub sticking out. 3 Answers The rear air works fine, the a/c is cold, and the heater is hot. no longer work in car, what could be the problem?. Why Does Air Blow Through Defrost And Not Through Vents? How Cold Should The Airflow Be Coming Out Of The Vents In My House? I Have 1996 Chevy Blazer And The Ac/heat Only Come Out The Defrost Vent And Not The Front Vents What Is Wrong My Vehicle Please Tell Me Its Not My Ac/heater Switch? How to change a citroen berlingo fuel filter?. Air Comes Out Of Defrost Vent Only. Subject: Vent Control question IP: Logged Message: Ive got a 95 dakota, and the vent control only allows air to blow out of the defrost vents. Air only blows out of defrost vents. Well everyone seems to be typing random answers which don't answer the question, so I will. Hello, on this particular model of vehicle they have whats called a blend door actuator in the HVAC. Air only blows out of front vents (not from bottom heater or defroster) on 2002 Buick LeSabre I am only getting air to come out of the front vents of the dash. Not a blend door problem. truck has the 4. Vacuum Pump (Source on Diesels) has no power to it. I got a 2001 VW Passat V6. I can change fan speed, temperature, etc. The air tumble cycle or air only temperature does not add heat to the dryer. Need help fixing my ac/heater that does not blow out any air through the center vents or out the windshield area. I noticed that the cold A/C blows out of the defrost vents against the windshield even when the defroster is set to off. Air tumble cycle or air only temperature can be found on the control knob or button with the other temperature selections. I have done both of these to no avail, but when I take the HVAC fuse out the blower then will begin blowing out the vents properly but when the fuse is replaced it goes back to blowing only out the defrost. Still today the fan is on but no air coming out front vents. info on your HVAC and. Jun 15 2013, 9:35pm I discovered today that I only receive air through the defrost vents. I changed the blower relay in the fuse box next to the battery and put in a new blower fan under the glove box but it still does not blow air out in the front. So I decided tostart in the engine compartment first, and trace back before tearing apart the dash. On the 07 silverado I just bought I found out this morning that the heat is only blowing through the defrost vents no matter what setting it's on. Yesterday we finally got some nice weather, and I turned the AC on, but it won't blow out the vents, it will only blow out of the defrost, what's up with that? :yikes: I have to turn my windshield wipers on because the glass gets cold enough that I get condensation on the outside of the windshield. Did that, presto, problem solved! Take the junk out of the glove box, squeeze the sides, and let it flop down. If the a/c button is pressed in but fan selector is off the amber a/c light will be on sometimes or just flicker. Got three of these trucks with a combined miles of close to 800,000. This 2005 GMC Sierra came in with the complaint that the air will only flow from the defroster vents, regardless of where it is commanded to. checked the 2 actuators behind the glove box and 1 under drivers side, all are functioning correctly but still not floor heat. You will need to check the vent actuator to see if its functioning. No heat to feet or defrost. Similar to the other post on here, my HVAC system is stuck in defrost mode. 2002 Tahoe Only blows air out of defroster and floor vents Discussion in ' Technical Discussions ' started by Cali_02Tahoe , Sep 9, 2008. When running the A/C, heat, defrost, or vents only, the air will only blow out from my dash vents on any direction setting. So, this morning it started to come back out of the defrost vents while in vent mode. Air always blows out the Defrost and AC vents 50/50. The dial at the bottom of the vents are open and I even pulled out the middle right vent to inspect the mechanism and everything is working fine and there is no blockage at the front of the vent. Air conditioner blows out the defrost vents only. The factory vacuum check valve is very hard to get to. The defroster setting is an indication of NO vacuum. Normally it is a Ford part buy you should be able to find it at NAPA or other auto parts stores. The windshield defroster vents quits blowing air/heat. Average failure mileage is 140,000 miles. Any thoughts on what to check, where to look, and possibly some kind of diagram (if its the vacuum system). The windshield will condense and fog up on the outside of the glass, center lower portion. The a/c will only blow through the defrost vents. So today my wife's terrain decided to stop blowing air out of the front 4 vents. When you chose "auto" then it will blow in your FACE. Once again, it doesn't matter which of the three it's set on, it comes out defrost and floor vents. I get good heat and air conditioning from my front vents, but when I select floor or defrost vents, the air still only blows from front vents. cool ill look i have the whole dash off the car still and i was also wondering why the vents for the rear only blow cold air when the heater is on and when i turn the heater on and the ac at the same time i get heat out of the defrost and very cold air out of the rear vents any ideas?. As long as you have the right temperature air coming out of the correct registers, you should be OK. It is actually a pretty simple problem and strangely enough it is not an electrical problem. You can somewhat determine this by selecting function c, and rotate the temp wheel to min (maximum cooling). I just bought a new climate control box and installed it, but it did not fix the problem. I have a 2006 Grand Prix that is only blowing out warm air instead of hot air like it should. When I turn on the heat or a/c it only blows through the defrost vents,is this a vacuum line or stepper motor problem?. I only have 62000 miles on this thing, and I'm about ready to take it a junk yard. The fan worked fine and the air was cold, I just couldn’t direct it out the front air vents. My 2012 Jeep Liberty's air conditioning is only blowing out of the defrost vents not anywhere else. When the air flow is set to floor only, floor and defrost or defrost only, the air always comes out of the floor AND the defrost but not the dash vents. I noticed that the cold A/C blows out of the defrost vents against the windshield even when the defroster is set to off. when i flip to the front vents its coming out about 50 degrees so huge difference just not sure why heat blow out defrost and not other. The air blows strong just not through the front air vent. Heat works fine if I turn up the temp, if I turn it down, the AC works fine, I can tell the recycle works, outside air works you can hear the difference and increase in flow for recycle and a little bit of temp change on outside air, but it will not send the air out the dash vents, or floor no matter what mode setting I select. After replacing filters it did not fix my problem. My car was hot inside yesterday after he changed that, but now it wont heat up. SOURCE: climate control system only blow air out defrost vent there is a good chance that you blend air door is stuck closed over your heater core and therefore not allowing the heat to flow, also your door that opens and close your direction of flow from the floor ,das,vent and defrost. Re: no air through vents, only defrost. I can go a week without being able to switch from main vent to floor and mains to defrost but eventually it gets stuck on the main vents. The control is usually fed by a vacuum line or small hose thats is connected to your intake manifold. The AC is only blowing out the defrost vents Question: The AC is only blowing out the defrost vents and not the front AC vents. My car has an automatic transmission. The driver power window switch won't work, but Buick states there is a pending recall, inside the panel, the switch is melted. When I put the controls on vent, things blow through just fine too. It may be not working the compressor, AC cycles are based on compression and expansion of refrigerant gas, if your compressor is not working it may not be cooling the air, if there isn't any air blow (not even warm air) it could be a fan issue, check by yourself under the hood if both of the fans are working or it does any sound when you turn it on, if it doesn't also could be a switch problem. blows out defroster only Post by lgoff » Wed Aug 04, 2010 2:43 pm I have a 2003 F150 that the air only blows out the defroster ventsat first it would alternate between the dash vents and defroster vents for only a few seconds then gradually got worse , although i can feel a little out the floor vents very littlei hate to pay to. AC/Heater air only blows out defrost and far left/far right ventWhy?? 04-25-2017 11:01 AM #1 So when I turn on the blower fan and no matter where I put the ac/heater selector the air only blows out the defrost vent and the outer edge dash vent swhat makes it do this and how to I get airflow thru the center dash vents. Replaced the lines going from the T and to the fender. What you have is a vacuum leak. 0 diesel blow only out defrost ports and not from vent or floor What is going on? you have a vacuum leak. My C280 seems to have developed a bad actuator motor MB calls it a stepper motor in the plumbing vent work. Yesterday we finally got some nice weather, and I turned the AC on, but it won't blow out the vents, it will only blow out of the defrost, what's up with that? :yikes: I have to turn my windshield wipers on because the glass gets cold enough that I get condensation on the outside of the windshield. I have the same problem. The vacuum pump may also run excessivly. Do you really want hot air in your face ? If you leave it in that mode, expect your windows to start fogging up ! Hope this helps !. My son's '97 ZJ blows cold air, but it only comes out of the defrost vents on top of the dash. Did that, presto, problem solved! Take the junk out of the glove box, squeeze the sides, and let it flop down. Recently, the air has started blowing mainly out of the defroster vents. Jetta Hvac control problems. 5l X-type seems to only blow hot air when the heater is set to windshield defrost. How do I replace it? I only have air at the vents, no defrost or heat at floor. Air only blows out of defrost vents. What could be the problem?Optional Information: 2001 Jeep Grand Cherokee Answer; Automatic Climate Control: This is a common issue with the the Grand Cherokee's. The air is only blowing out the defrost vents because it is a default mode. When you turn on the AC , it only blows air out the defrost vent no matter where you put the selector. From: Message: wildbill Dodge Dakota JOIN HERE 8/17/2005 14:55:36: Subject: AC/heater only blows out defrost vents IP: Logged Message: 97 Dakota all of a sudden started only blowing out the defrost vents on all position settings. Re: Air Coming thru Defrost Vents chances are that if there's outside air coming in the fresh air flap door is leaking or damaged. my truck does the exact same thing, only the air blows out fine, but when accel hard or pulling up a good size hill air stops blowing out the vents or floor where ever i have it setting and blows out the defrost. Many people can switch to floor but can't get air out the dash vents (I think your model won't do that unless in cooling mode) due to problems with the vacuum lines in the clear plastic connector at the programmer on the corner of the heater box. com! We are the oldest and largest V6 Mustang forum on the internet. As long as you have the right temperature air coming out of the correct registers, you should be OK. 5L 4 cylinder, manual transmission, RWD. I am about at whits end. They say the cost is related to the pulling the dash out. I went and got a new battery and now the vents won't blow. Billy Dodge Dakota JOIN HERE 5. After replacing filters it did not fix my problem. If I leave the control on regular A/C for a while, it will eventually start coming out the dash vents, but as soon as there's a load on the engine, it switches back. Normally it is a Ford part buy you should be able to find it at NAPA or other auto parts stores. This is a brief video explaining the cause and solution to a common problem with air vent controls. To my knowledge its doing this because either the vacuum pump isn't working or there is a leak somewhere. Why Does Air Blow Through Defrost And Not Through Vents? How Cold Should The Airflow Be Coming Out Of The Vents In My House? I Have 1996 Chevy Blazer And The Ac/heat Only Come Out The Defrost Vent And Not The Front Vents What Is Wrong My Vehicle Please Tell Me Its Not My Ac/heater Switch? How to change a citroen berlingo fuel filter?. but I will go out and try to find the motor. When the air flow is set to floor only, floor and defrost or defrost only, the air always comes out of the floor AND the defrost but not the dash vents. Post by Kolb » Tue Jul 12, 2011 7:42 pm Hi, I have a 2001 Ford Taurus and recently I cant get the A/C or Heat to blow through any other vent except the defrosters. Seem to have lost fan control levels also. On the 07 silverado I just bought I found out this morning that the heat is only blowing through the defrost vents no matter what setting it's on. The ones on the outside, next to the windows blow perfectly fine. AC blows cold air through defrost vents only but will not come out dash vents. Air automatically only goes through the defrost and feet at all times. You can hear it make a noise when you switch from floor to vents like something is opening & closing but doesn't blow out floor vents very good either. Everything gets hot and cold and the fan motor works great but it's all just stuck on blowing the air out of the vents. When there is either a partial or total loss of vacuum, the system will default to either defrost or on some vehicles, heat. blows out defroster only Post by lgoff » Wed Aug 04, 2010 2:43 pm I have a 2003 F150 that the air only blows out the defroster ventsat first it would alternate between the dash vents and defroster vents for only a few seconds then gradually got worse , although i can feel a little out the floor vents very littlei hate to pay to. When the heat is turned on and set to floor position, the same thing happens. This cooled air is returned to the refrigerator or freezer compartment, and so keeps the box air cold. The air is only blowing out the defrost vents because it is a default mode. No matter what setting it's on, or speed, it all comes out the defrost vents. I replaced the control panel and still the same problem. When Mix is on, only the defroster and floor vents have air coming out through them. Any ideas?. I changed the blower relay in the fuse box next to the battery and put in a new blower fan under the glove box but it still does not blow air out in the front. They say the cost is related to the pulling the dash out. I have tried every position on the control panel but cold air mainly comes out from the defrost vent on top of the dash blowing straight at the windshield. No defroster air or air going to the floor. When the air flow is set to floor only, floor and defrost or defrost only, the air always comes out of the floor AND the defrost but not the dash vents. On the 07 silverado I just bought I found out this morning that the heat is only blowing through the defrost vents no matter what setting it's on. There are a series of doors and flaps inside the vents in your Jeep that control which vent the air blows out of and whether it goes over the cooling coils, the heater core, or both. It may not be relevant but it seemed to start after plug and wires where repalced, is there a vaccum that could have come loose and caused this. My battery went dead on me a couple of times and I got it jump started. A few minutes later, it stops blowing out of the vents and blows out of the defroster. It is an '05 GM with automatic climate control. Does anyone have any ideas as to what the problem is before I go ripping into the dash. There are several vacuum hoses of different colors. but it only blows out of the defrost vents. I had the same issue with my 2008 Silverado in that the air would only blow out of the defrost vent. I only have 62000 miles on this thing, and I'm about ready to take it a junk yard. - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. A/c blowing cold air but Stuck on defrost Hello, I was wondering if there's anyone else with this problem? My A/C is doing good its cold and blowing air, the problem is that it's blowing it only on the defrost mode , (towards the wind shiled only) no matter how many times I try to change it the wheel does nothing, the wheel to change positions. However; I noticed on the Heat/Defrost Door Actuator, the Door Pivot Connection was disconnected. Y'all ever encountered this before?. After moving the doors for the 10 minute drive to work it slowed down. Fan Only Blows Defrost, Won't Change To Floor Or Vent. Where is the expansion valve in our car? 4. My car was hot inside yesterday after he changed that, but now it wont heat up. • Save 50% over cost of new online and more over a dealer for this OEM replacement • Does NOT come with the round connector on the end the knob clips into FYI. Ranger & B-Series - A/C only blows through defrost vents - I have a '97 Ranger with the 2. If the hoses are wraped around the rod, inspect for damage to the hoses. Seem to have lost fan control levels also. You can hear it make a noise when you switch from floor to vents like something is opening & closing but doesn't blow out floor vents very good either. I checked all of the vacuum lines and verified their correctness using a 1986 Service Manual so I know that's not the problem. How do I replace it? I only have air at the vents, no defrost or heat at floor. Air only blows out of defrost vents. Whne you turn the heat or air conditioning, the fan blows air. My car has an automatic transmission. But hot air (as expected) on the driver's side. No matter what setting it's on, or speed, it all comes out the defrost vents. Air tumble cycle or air only temperature can be found on the control knob or button with the other temperature selections. I looked in my Clymer manual on how to adjust the HVAC control cables (temp and vent selection). • Save 50% over cost of new online and more over a dealer for this OEM replacement • Does NOT come with the round connector on the end the knob clips into FYI. When I put the controls on vent, things blow through just fine too. I have heat, air conditioning, and defrost, but only from the dash vents. If after you loose vac air only comes out the defrost (and leaks out of a couple of other vents), then your 87 is probably the same setup and it is having a vac issue. I have a 04 silverado 1500, and the ac will only blow through the defrost vents. The defroster takes longer compared to normal to operate, blows in filthy air, or doesn't work; Your heating unit or A/C only operates when driving, not when idling, or stops blowing when the automobile is idle; Your heater blows chilly air, or the A/C blows warm; At the greatest setting, your vents don't push out much air; A comprehensive. I've replaced the switch that directs the flow to air vents, defrost and, and floor, but it hasn't changed. I was going to tear into it today, but we just got another inch of snow, so I am sitting in here where it is warm trying to find a bit of info. AC/Heater air only blows out defrost and far left/far right ventWhy?? 04-25-2017 11:01 AM #1 So when I turn on the blower fan and no matter where I put the ac/heater selector the air only blows out the defrost vent and the outer edge dash vent swhat makes it do this and how to I get airflow thru the center dash vents. What could be the problem?Optional Information: 2001 Jeep Grand Cherokee Answer; Automatic Climate Control: This is a common issue with the the Grand Cherokee's. Ranger & B-Series - A/C only blows through defrost vents - I have a '97 Ranger with the 2. My car has 96000 miles. The leak was a simple fix. Open 7 days a week. When the heat is turned on and set to floor position, the same thing happens. Something happened last night and the air started blowing but after about 30 minutes no air blowing. Air only blows through defrost vents, cannot change heater settings, Escalade, Avalanche, Silverado, Suburban, Tahoe, Yukon, TSB, #04-01-38-008 GM has issued a technical service bulletin (TSB) #04-01-38-008 to address problems with the heating system, blower control, and airflow on the following models:. You can hear it make a noise when you switch from floor to vents like something is opening & closing but doesn't blow out floor vents very good either. 1990 190e 2. The 2001 Chevrolet Suburban has 1 problems reported for ac blows from defrost vents only. Also my air only blows out the defrost vents and the floor vents. Is this electrical switch problem. It may not be relevant but it seemed to start after plug and wires where repalced, is there a vaccum that could have come loose and caused this. Air only blows thru dash vents, no defrost or floor heat 2011 F250, (gasser, company truck) Air only comes out of the dash vents regardless of what temperature. Cold air comes out of the defrost vents and floor vents only. When there is either a partial or total loss of vacuum, the system will default to either defrost or on some vehicles, heat. Mine was broken completely off with just a nub sticking out. I think that is just the noise of the HVAC system setting the air distribution baffles (aka the Curtain) in whatever position requested by the AC settings on the CIU. Air vents on your 2005 f-250 6. I went and got a new battery and now the vents won't blow. Why won't air blow out of my dash vents only floor and defrost? My girl has a 98 jeep Cherokee and the air only blows out the defrost and floor but not the dash Follow. There are some cold air coming out of the side vent though. Re: no air through vents, only defrost. If I stop and turn the engine off for a few minutes, it will work fine again for another 15-20 minutes. Jun 15 2013, 9:35pm I discovered today that I only receive air through the defrost vents. If I select "vent" on the controls, the air comes out of the dash vents but does not go through the AC coils. After replacing filters it did not fix my problem. Hot air blowing only on defrost setting Hi, My Dad's 2002 2. Has anyone had experiences with a similar issue or recommendations? I only recently discovered this problem is intermittent. If I leave the control on regular A/C for a while, it will eventually start coming out the dash vents, but as soon as there's a load on the engine, it switches back. SOURCE: All Air Conditioning blows our the defrost vents Some thing you could look at would be this. Air came out only at the defrost vents when I got it (at age 16). on my jeep it a black ball a little smaller then a volley ball with 2 or 3 vaccumn line comeing out. The air only blows out of the defrost vents onto the windshield. So I have a 97 jeep tj 4. You can hear it make a noise when you switch from floor to vents like something is opening & closing but doesn't blow out floor vents very good either. The same looks true for the heater water valve, that it's a single core and should put out heat (or lack of) on both sides depending on the amount its valve is open. It has a thermal fuse that blows and causes the problem. I can't figure out where the the plug is in the dash to unplug. 3 4x4 my hvac actuator mode valve does not work. It routes or allows EITHER HOT air from the heater core OR COLD AIR from the AC coil to flow through the HVAC system. You can read more here and make your cookie choices. It is an '05 GM with automatic climate control.