Re: 01 - AC issue - blows out of defroster Tell him you have a vacuum leak on your HVAC system, if your lucky it's under the hood, if your not it's in the dash. Fuse good. I'm wondering if something is simply stuck or if it's a bigger issue? A/C only blows through defrost vents. It doesn't matter which vents are chosen in control. Jun 15 2013, 9:35pm I discovered today that I only receive air through the defrost vents. Heater working but only blows out front vents. I have a 2000 Winnebago Adventurer on the Ford F53 chassis that will not distribute the AC air out the dash vents.....only sends it out through the defrost vents. But about a week ago air just stopped coming out of all the vents and would only come out of the defroster vents. Ac is working but blows through defrost. My 2006 Mercury Grand Marquis only blows air through the defrost vents. tried to change it to the floor or the dash vents, no deal. No heat to feet or defrost. (defrost, upper dash, feet) I only get air coming out of the defrost vents....and of course in the off position everything is off. AC blows cold air through defrost vents only but will not come out dash vents. AC Only Comming Out Defrost Vents Quote Post by islandtuner242 » Sat Jan 22, 2011 1:07 pm Ok i've got a 1990 n/a that's only blowing out of the defrost vents and no other ones can anybody help?? After re-installing it I found my AC was only blowing through the top vents. 2001 Ram 2500 QCLB 4x4 Auto. It sometimes blows regularly when I have the AC on low. Cooling, Heating, Ventilation & A/C - Air conditioning blowing only thru defrost vents - My A/C is blowing cold but only thru the defrost vents. It would then work when I got back on the gas. 3.54 R&P, Camper/Trailer package. It started with my AC not working while I was at a stand still, say in traffic. 2003 durango air vents only on defog I'm having a similar problem with my 2003 durago slt. 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 dial but there is still no air at all to feet and defrost. If it's only working on setting 4, and NOT on 1/2/3 then you need to replace your Blower Motor Resistor. The A/C blows ice cold, but I'm getting most air flow from defroster vents at base of windshield. No matter what position the dial is on the air refuses to blow through the front vents for the driver and passenger. AC only comes through the defrost and floor, and heat always comes out the floor vents all the time.....wierd Richard I don't want any superpowers, just diplomatic immunity - … It was working fine yesterday & this morning it started acting up. Have tried a 2nd control unit in dash - Chevrolet 2004 Silverado question Vacuum supply starts on the drivers side of the engine. How do I determine what the cause is? The Heat/AC in my car is only blowing through the vents under the windshield (The ones that would come on only if you turned it to defrost), but no matter what setting I turn the dials to, it won't come out the main cabin 2003 taurus: ac only blows thru defrost vents 3.0 v6..hose 2003 taurus ac only blows thru defrost vents 3.0 v6? Mode Door 2: When mode door 1 is set to divert air away from the vents and into the second stage of the system, door #2 chooses whether air I have a 1998 Windstar thats A/C blows cold as ice. AC and Max AC. I checked the fuses, and was at a loss after that. 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 I just need to know where to look and what to look for. A/C blows through Defrost vents. It started to do this ever since I got the intake manifold replaced.I have got it checked by a trusted mechanic and he said the lines are good. Fan Only Blows Defrost, Won't Change To Floor Or Vent. I was wondering how you fix the AC blowing out of the defrost vents? My AC is only blowing through the defrost vent and the temperature control doesn't do anything. IF your car uses vacuum for mode control, check the line that comes from the throttlebody or intake manifold to the upper passenger side of the firewall - a vacuum control line. the side vents are functioning properly. I have a 2004 GMC Sierra 1500 with the duel climate control A/C. Is it a vacuum leak or what? I assume it's a vacuum line that probably got disconnected. Bring the vehicle to a When you turn on the AC , it only blows air out the defrost vent no matter where you put the selector. Re: AC/Heat Only Blows out Dash Vents Post by dmoto » Tue Dec 10, 2019 7:55 pm Having the same problem, regardless of the position selected, air will only flow through dash registers. Oddly enough, a few days later, the problem managed to self correct. Is there anyway to upgrade the in-dash unit to allow you to turn on and off the AC compressor while independently selecting, floor, foor / vent and where in the car is the broken/damaged … So not really jeep savvy yet and trying to figure out why when I cycle through all the heater options i.e. In my experience any Ford vehicle with Air conditioning uses vacuum to change the vents, anytime there is a leak or ina diesel the electric vacuum pump quits they always default to the defroster. I just got into a car accident yesterday and got an auto body shop to look at the damages. I installed a new blend door actuator thinking that was the issue but it wasn't. In every position, from 'vent' to 'AC' to 'Max' it blows out of the top defrost vents. Had this happen before, vacuum line leak on the SOF 4x4 system. Won't switch to floor Or foot vents . One problem, it only blows through the Defrost vents not the vents in the dash. The Rear A/C does the same but only through the Floor vents. If you have air flowing only through the vents with no defrost or floor, this door is failing. Fuse chart shows # 28 which serves the back-up lamps too, which are not working. RE: AC/heater only blows out defrost vents IP: Logged Message: I have a 2002 Dodge Dakota - 3.9 L and in June of 2007 I had only air coming out of my defrost vents, so I had the vent control motor replaced and it was working Actuator works fine. Vacuum Pump (Source on Diesels) has no power to it. Fan motor works fine, Tem switch works fine, but the other is stuck blowing out in defrost no mater which vent you turn to. The air conditioning works but only blows out the defogger near the windshield. Ac will not blow through center dash vents. I have a 2006 pt cruiser and the ac works fine but only blows through the top vents (defrost) it dont matter where i put the knob at it only blows through the defrost on top i can turn it to blow through vents in front or bottom by legs The A/C and heat work fine but only blows out the defrost vent on the dash. How do I reconnect or fix the vents so the ac blows through where it is supposed to? My 2004 F250 was blowing A/C out of defrost vents only. There is no air what so ever coming out of the passenger facing vents from the dash. A small amount from side vent and little to none in the center dash vents. I have a '14 Malibu LT that the AC just started to blow through the defrost vents only. For some reason my truck has recently started only blowing air/heat through the defrost vents, should i check for fuses or what? Dig through Cadillac Tech Tips for info on your HVAC and air blend/mode doors. The air (heat and A/C) only blows through the defrost vents but not the main vents. For both of these options the AC only blows through the dash vents. Hi, I have a 1999 Honda Accord Ex. My 2004 F350 diesel started blowing air out of the defrost vents only. All pointing to fuse #28. Under heavy acceleration or engine load, the unit stops I have tried replacing the console in the middle of the dash that physically controls those things as well as the fuses and blower motor relays as well. If anyone has had this happen before I would appreciate some help because I do not know how to fix this problem. I replaced the Control What could have caused this? The AC only blows through the defrost vents on the dash. My '95 GT's A/C now only blows throught the defrost vents. p.s found broken hose from fire wall, where does it go? Found this post, ordered the pump online at www.ford-parts.com for $95 plus $8 shipping, it … Thats A/C blows cold as ice and was at a loss after that 2004. Ac was only blowing through the defrost vents 3.0 v6 F250 was blowing A/C out of passenger! 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