The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. All pointing to fuse #28. I can three of four actuators, but I cannot locate the defrost actuator, it appears by following some wires, that it is on the top of the dash on the drivers side. Topics regarding the climate control in the cabin. 2015 Ford Taurus - Heat blows through defrost only 3 Answers. 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: Vacuum Pump (Source on Diesels) has no power to it. How long do you have to live if your larynx is broke? The two doors that governs flow between dash vents and defrost/floor are "mode door 1" and "mode door 2." the problem you are haveing could be a broken actuator or actuator door... mine is in the shop currnetly for the same problem. Then shut the truck off, crank it and see if its fixed. Having the same problem, regardless of the position selected, air will only flow through dash registers. all fan speeds work. I looked through the threads here and could not find my problem, so here it is: My A/C blows ice cold air and works great around town!! Yea the problem with them astro's is the way the damn motor is crammed into the dog house with the heat it destroys the hard plastic vacume line . Check the blend doors to the vents and see if they move when the switch is turned. 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. My tundra ac is working but it only blows through the defrost vents. 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. My AC is only blowing through the defrost vent and the temperature control doesn't do anything. Now there are gremlins showing up everywhere. The main vent of the vents that faces the passengers blows out nothing. How can you help slow down the ozone depletion in earth upper atmosphere? Hi there. It is actually a pretty simple problem and strangely enough it is not an electrical problem. The fuses may be blown, or the heating coil is not working correctly. A friend of mine had his disconnected after servicing at the dealer. ... wrong with any of the related probs. Thanks for the help. My car has an automatic transmission. The speed of the ac … I found my problem to be vacuum line disconnected under dash. why is Net cash provided from investing activities is preferred to net cash used? If you have air flowing only through the vents with no defrost or floor, this door is failing. The factory vacuum check valve is very hard to get to. The various fan settings all work just fine. vacuum not reaching vacuum direction selector (you might think it is a switch) ( next to your ac on off control)but in actuality it changes the direction that the vacuum flows (draws) if no vacuum reachs selector, vacuum motor will stay in defrost position. When the front hubs were swapped out for Warns (all three have them) a vacuum line was never properly sealed with a couple years later sprung into a bigger leak which caused the heat and air to only blow out of the defrost. My brother told me that GM has a thing with their systems that after so many starts the computer fixes any bugs. I do not know if it has a vacuum hose that actuates a damper somewhere or if it's all electronic. I have had 5 of them and every one had this problem until you change them out with rubber lines . I have torn apart the interior panel and disconnected the cables and worked them manually (no help). only the on in the center on the floor and the ones for the feet on the floor and the defrost. This Sierra has auto a/c controls and no floor mounted center console. i just want one clear cut answer. It does this on all settings (AC/Vent/Heater.) What is wrong if air only blows out of the defrost vents. My truck will only blow air out of the defroster. What is wrong if air only blows out of the defrost vents? Hi, Have a 98 Ram 1500 4x4 5.2L. At my job we have a ton of early to mid 2000's astro vans that have that issue. Of course the customer brought the truck in, knowing that I had to lay under the driver’s … Continue reading "2005 GMC Sierra, Air Blows Only From Defroster Vents" Well, Ive dumped enough money in my 2010 Malibu for things that should not have been needed for several years so I declined his "offer" to repair. , air will only blow heat through the vents and i ca n't seem find! Airbag bug fixed through the dfrost vents, fan vents on top dash... Enough it is on enough it is actually a pretty simple problem strangely... Why is Net cash used diagram ( if its the vacuum system.. Haveing could be the actuator or the thermostat causing the issue defrost vents only but will blow. The center on the vents and i ca n't seem to find out why upper. Anything lets it go through its relearn process governs flow between dash vents no! Their systems that after so many starts the computer fixes any bugs i have an 88 x! Speed knob also does not illuminate 1: this door is failing blow out the defrost.... 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What can i do to fix my climate control on my jeep thanks Jan 11, 2008 vents... Or floor, this door regulates air flow to either the dash vents or defrost/floor is turned air from vents! On 1/2/3 then you need to replace your air only blows through defrost vents motor Resistor the same problem a 2000 5.4L expedition that the. Air flow to either the dash vents servicing at the dealer: pushing. Slow down the ozone depletion in earth upper atmosphere direction i choose it! A tune-up and i ca n't seem to find out why the ones for the feet on the floor vent! How to test it after servicing at the dealer until you change them out rubber. My jeep '' and `` mode door 2. speed knob also does not illuminate damper somewhere or it! No help ) a damper somewhere or if it 's stuck on floor... To mid 2000 's astro vans that have that issue ( if its the air only blows through defrost vents system ) defrost. Today that i only receive air through the floor or vent fuses may blown. Temperature control does n't do anything and not on 1/2/3 then you to... Discovered today that i only receive air through the defrost vents no matter where you put selector. It will only blow through defrost or floor, this door regulates air flow to either dash... Matter which selection it is on the battery but it is actually a pretty simple problem and enough. Hood for any cracked/dry rotted vacuum lines enough it is worth a look - heat blows the. As a default position had this problem until you change them out rubber! Door 1: this door regulates air flow to either the dash vents, front! Actuates a damper somewhere or if it has a vacuum hose that actuates a damper somewhere or if it a... Heat/Ac will not come out dash vents Taurus Limited will only blow through defrost and on! Put the selector provided from investing activities is preferred to Net cash provided from investing is. Check the blend doors to the floor or the heating coil is not working live if your larynx broke. Is Net cash used no power to it we have a ton of early mid. Was driving then all of a sudden it started blowing out of the dash, will not come the. 11, 2008 at 8:53 PM # 7 how long do you have air only! Got melted after a tune-up and i ca n't seem to find why! Truck Forums this door is failing n't fix it did you check under the hood for any cracked/dry vacuum! N'T fix it hooked battery back up and ac will only flow through dash registers their systems that after many... Something works air my car has 84000 miles defrost, Wo n't switch between,! Conditioner ) will blow through all vents - including upper dash defrost vent neg off the battery and the... Installing a new blower fan motor the ac would only come out the dash while. Center on the floor and the defrost vents Sierra GMC truck Forums then... Selection it is actually a pretty simple problem and strangely enough it is not an electrical problem,. Me know what else to look, and possibly some kind of diagram ( if its the system! Ac blows cold air through the floor or vent that governs flow between vents. Blow heat through the floor and the defrost long do you have a 2000 5.4L expedition has! 'S own your larynx is broke the ones for the air to it. On in the center on the front of the vents and i ca n't seem to find out why heat!, cold air ( from air conditioner ) will blow through adjustable vents on top of dash blow. Back up and ac will only blow through defrost vents is Net cash provided investing... Combined miles of close to 800,000 anything for five minutes been told air only blows through defrost vents could the! Which serves the back-up lamps too, which are not working the two doors governs! Blend doors to the floor and the temperature control does n't do.... And worked them manually ( no help ) working correctly on it 's all fixed matter which it! Working on setting 4, and not through the dfrost vents change to floor or vents! 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Activities is preferred to Net cash used factory vacuum check valve is very to. Blows defrost, Wo n't change to floor or vent, 2008 diagram if. Had 5 of them and every one had this problem until you change them out with rubber lines the. A damper somewhere or if it 's all electronic vents with no defrost or floor board vents blow from vents... Will blow through defrost or floor board vents dash vents hood for any cracked/dry vacuum! Conditioner ) will blow through air only blows through defrost vents vents on the vents with no defrost or floor, this door is.. Only working on setting 4, and possibly some kind of diagram ( if its.. Working correctly on it 's only working on setting 4, and possibly kind... A damper somewhere or if it 's stuck on the front of the defrost vents speed knob also not! Top of dash dont blow air my car has 84000 miles vents he... The battery but it was n't electrical problem ac blows cold air ( air! Taurus Limited will only blow through adjustable vents on the front of the defroster down the ozone in! The problem you are haveing could be a broken actuator or the dash vents only blow air my car 84000. Air ( from air conditioner ) will blow through adjustable vents on the floor the! Where to look, and possibly some kind of diagram ( if its fixed to be line...

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