ac blows through defrost when accelerating

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There is also a revised vacuum check valve available to address this concern. Air quits coming out the normal vents and goes to the windshield defrost. Why does my A/C blower switch from vent to defrost when I accelerate? pissedriteoff. I have seen a write up for this fix somewhere but cant find it. AC blows through defrost vents when accelerating The AC blows through the dash vents just fine when crusing, but if I accelerate to pass someone or going up a hill, it starts blowing air through the defrost vents only. Jul 16, 2011 #2 I believe these cars are notorious for this. I created this video with the YouTube Video Editor (http://www.youtube.com/editor) Then when I let off the accelerator the air rushes out. About Us - This system will have a vacuum line coming off the intake going towards the firewall and thru to the control panel with a vacuum reservoir connected inline. Cookie Policy - I just noticed yesterday that under acceleration, the air conditioner completely stops blowing through the dash vents and switches to the defroster vents. Air blows through defrost upon acceleration on my 2004. Have fun finding the broken line!!!! Sounds more like a vacume problem to me. ?. 2001 ford f150 vent air goes to defrost when accelerating - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. Ford Super Duty (1999-2016) :: 2005 F250 Blowing AC Through Defrost Only All The Time. I am an AC and refrigeration technician. Thanks 2001 JGC 4.7 OME Coils Wrangler Silent Armor's 255/70/17 davew0670 is offline Quote Quick Reply. switch or leaking vacuum door motor. Ac blows through defrost when accelerating Ac blows through defrost when accelerating Advertisement . Check the vacume lines for the ducting and the vacume canister (could be cracked and leaking). I keep hearing about a "ball" a vacuum ball that controls the flapper? I tried playing with the controls to get it to switch but couldn't. 3 Dangers Of RVing With Dogs That Are Totally Prev... 21 RV Parks And Campgrounds To Visit In 2021, http://cdn.johnywheels.com/2015/12/0...facaf967a.jpeg. It blows real hard for a minute and goes away if I accelerate through … My 2005 F-250 6.0 liter Diesel FX4 Lariat is blowing AC through defrost only all the time. It will also allow you to check for leaks without the engine running. When I am accelerating at a greater pace, the air condition will cut out and blow out of the defroster. Air quits coming out the normal vents and goes to the windshield defrost. Seen it plenty of times. When I go downhill or decelerate the air returns to the vents. Facebook se ha convertido en una red social que probablemente incluye perfiles de su prima de 7 años de edad, así como su abuela de 70 años de edad. Ford 6.0L Power Stroke Diesel :: 2006 F350 Blowing Air On Acceleration. It worked fine till now, then it started cycling only when accelerating up a steep hill, and now it pretty much does it every time i accelerate at all, even when stopping at stop signs and such. Wanted to see if anyone might know why my AC cuts out when i accelerate usually above 2000 RPM, then when i let of the gas when im up to speed the AC... Log in or Sign up. When the A/C or heater is on and I accelerate, the air quits blowing through the vents on the dash and only comes through the defrost vents. Terms of Service - US State License Plate Mottos Quiz: Where Are We? This happens when both A/C or non-A/C vent is on. When accelerating the AC blows from Defroster. 1,844 satisfied customers. Letting up on the acceleration, it'll start blowing again through the dash vents. Jump to Latest Follow Status Not open for further replies. I have a 1989 Mustang LX notchback 5.0 with an air conditioning problem. 3 Answers. Sounds like you're going 100mph with the hood unlatched. Basically, the blower motor ensures that the right amount of power reaches the motor, which spins the fan at the correct speed for blowing air from the HVAC system into the cabin. Check the vacume lines for the ducting and the vacume canister (could be cracked and leaking). DODGE RAM FORUM - Dodge Truck Forums. Archive - I decided to live with it. The air conditioner only blows through the defrost vents only, even when switch is turned to Panel or Floor. There is also a revised vacuum check valve available to address this concern. My 2006 Mercury Grand Marquis only blows air through the defrost vents. It sometimes then sta … read more. 1 Answer. Is possible that break could be under dash where they route thru to the panel or a bad panel vac. The AC on a 1998 Dodge Ram 1998 will only be blowing out the defrost vent if the air handler is not set properly. Check the vacume lines for the ducting and the vacume canister (could be cracked and leaking). Does the fan and the air blowing from the dash outlets (continues to blow, strongly) work without a problem ? I looked under the hood for the vacuum leak and didn't see anything wit the naked eye. Please explain. Any help will be greatly appreciated. If anyone has it or can tell me how to fix, I sure would appreciate. Remove Advertisements. Is this normal? Thanks! Want Answer 1. 2CARPROS-ARCHIVES MEMBER; 1995 FORD F-150; V8; 2WD; AUTOMATIC; 58,000 MILES; 1995 Ford F-150 Super cab mileage: 58,000. I have a 2001 Dodge Ram 1500 with the V6. The air conditioner will cycle between the vents, the defroster and the floor. Is this a DIY fix or better left to the pros? I have a 2006 6.0l f350 crew cab that blows air hard every time I accelerate. 1 Answer. the blend air door is stuck look down the heat vents to see if something fell in there Jul 11, 2010 | 2004 Dodge Dakota. Where I can find it specifically? There is also a revised vacuum check valve available to address this concern. Senior Master Ford Tech. The A/c blows cold through my vents, however, when I accelerate it quits blowing through the vents and blows through the defrost instead. Seen it plenty of times. The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. a/c blows from defrost vent when accelerating. My 01 SD won't blow air anywhere but through the defrost … I'm unsure of the part #, but Ford makes a valve that just goes into the vacuum line and is designed to prevent loss of vacuum in the dash controls. Can anybody help me with what is wrong? davehop. Diagnostic Technician. If I let go of the gas, it will blow out of the vents (how it should) after about two seconds. 1 Answer . It sometimes blows regularly when I have the AC on low. It sounds like there is a problem with the cabin temperature. Cables need adjusted or lubed?? Forums > Dodge Ram Generations Forum > 2nd Gen : 1994 - 2002 > General Discussion > Help Support Ram Forum by donating: This site uses cookies. Sounds more like a vacume problem to me. Is there something that controls a flap inside the blower system that is controlled by vacuum? CSA. I have a 2001 Dodge Ram 1500 with the V6. I have seen a write up for this fix somewhere but cant find it. What you say is true but it will not cause the air to blow out the defrost. I just noticed yesterday that under acceleration, the air conditioner completely stops blowing through the dash vents and switches to the defroster vents. I fixed it once and it did it again next year. SPONSORED LINKS. As you accelerate, the vacume is taken away and it causes the vents to switch to the defrost mode. When you step on the gas you loose engine vacuum and with the leak the flapper vacuum goes down also. Ac blows through defrost when accelerating Ac blows through defrost when accelerating Segú Do Not Sell My Personal Information -, By logging into your account, you agree to our. Posted by Rick Stevens on May 06, 2018. Advertisement . I have a 1998 Mazada B2200 pickup with a 4 cylinder engine. 405 Answers ; SOURCE: 2004 Pontiac Montana blows cold air in defrost. It was a broken vac line under the dash. 1 Answer 2004 ram only blows air out vents and not defrost. It only does this after driving for awhile and it is hot. As it stopped, i heard the compressor kick into overdrive (like it does when it is cooling the air before blowing it through the vents right as you turn it on.) Wanted to see if anyone might know why my AC cuts out when i accelerate usually above 2000 RPM, then when i let of the gas when im up to speed the AC kicks in. The cold air blows out of the defrost and floor vents all of the time. These doors are operated by small actuator motors that are activated when you turn the knob or switch to make a change to the vents. As you accelerate, the vacume is taken away and it causes the vents to switch to the defrost mode. Posts: 5,464 Likes Received: 6,508 Joined: Mar 20, 2016 Ram Year: 2015 … When accelerating... Share on Facebook; Share on Twitter ; Share on Google+; Share on Pinterest; Share by Email × Question about 1996 Dodge Ram. Why it's doing this. Is there anything I can do myself to fix this. Ford, F-150, 2001, 74,000, and 5.4L. 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. RE: AC/heater only blows out defrost vents IP: Logged Message: If this helps, I also have a 97 cc v6 with similar problem. My car has an automatic transmission. Howdy! Contact Us - Why does my 1999 dodge ram ac blow through defrost vents when i accelerate - Answered by a verified Dodge Mechanic We use cookies to give you the best possible experience on our website. Why does my A/C blower switch from vent to defrost when I accelerate? I have the exact same problem on my 97 dodge roadtrek, I have replaced alot of the small vacum lines under the hood, but still hasnt fixed it, next I will start under the dash, I dont see one of those vacum storage balls, im actually thinking of adding one if I cant find the problem,,,,, having a yard full of old cars ( and everything on Cadillacs was vacuum...). Vacuum drops under wide open throttle (WOT). When this happens it is usually a vacuum leak. a/c blows from defrost vent when accelerating. This may be intentional, or you could have a leak that drops the amount of vacuum under WOT to something below normal. My 01 ac has worked just fine up until today. However, I am not familiar with vehicle AC. things to check? boosted3 Senior Member. Will sometimes tee off and also supply vacuum for cruise. Thank-you. Clicking this will make more experts see the question and we will remind you when it gets answered. 06-15-2005, 07:24 PM . Stratis. Adding An RV Dishwasher: Here's How I Solved My Sp... Yosemite RV Resort, RVC Outdoor Destination, 7 Best YouTube Channels For New RV Owners, Camp Among Giant Redwoods In Northern California. Privacy Statement - you have to attach a check valve in the system. Thanks 2001 JGC 4.7 OME Coils Wrangler Silent Armor's 255/70/17 davew0670 is offline Quote Quick Reply. No matter which way I turn the vent knob it only blows out the defrost vents. The air conditioning blows out defroster on hard acceleration I know this is probably a vacuum leak have been unable to find more than one reserve tank the one I found is not leaking. No biggie but kinda annoying since I usually like to blow down to the floor. Posted by jhngfrth on Aug 28, 2011. I noticed today that whenever traveling and accelerating like going uphill for an extra length that my a/c will quit blowing and as soon as I level off or the need to accelerate levels off it will resume blowing. Very consistent, no matter what mode I set the air to (heater, vent, etc,). If anyone has it or can tell me how to fix, I sure would appreciate. View 5 Replies Ford Super Duty (1999-2016) :: 2001 - Vents Stuck On Defrost. blows out vent even if changed to defrost but change somtimes. I got in this morning to leave the house and the air was only coming out of the defrost vents. When I go uphill or accelerate the A/C stops blowing through the vents. You will usually find the problem under the hood in these lines. Anyone ever have this problem? The system blows cold air when it comes out of the vents. One path leads to despair and utter hopelessness. Also the air is not cold, I had the evaporator changed and recharged. Inside your vehicle’s vent system, there are small doors that open and close to change the flow of air running through the system. By continuing to use this site you consent to the use of cookies on your device as described … post #2 of 7 Old 06-16 … I had the same problem with my 85 Grand Marquis. 'More than any other time in history, mankind faces a crossroads. After awhile it "switched" and started coming out of the dash vents. There is no change when accelerating or … This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops. On my 1999 Dodge Ram, when accelerating with the A/C on, the air stops coming out the vent and comes out the defrost. Clicking this will make more experts see the question and we will remind you when it gets answered. When it is on the Vent, Automatic, or Max A/C setting it blows out of the vents until I accelerate. Advertising - It is a very good place to hook up a vacuum pump and see if it holds vacuum. Will sometimes tee off and also supply vacuum for cruise. This happens when both A/C or non-A/C vent is on. When I accelerate my AC from the vents changes to the defrost. AC blowing out the defrost vents!!! The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. speedometer or gps, which do i beleive? The following errors occurred with your submission, A/C blows from dash to defrost when accelerating, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. It is not model specific. My truck is a 1999 Ram 1500 Magnum 5.2 Auto trans if that helps Thanks Jul 24, 2017 at 1:23 AM #2. crash68 Senior Member. This can result from a piece of debris getting stuck or a faulty flap. AC is not working Inspection: $96.46 - $106.46: Get a Quote: Robert Tomashek. Think it's a vacuum prob, but not sure where to start! What you say is true but it will not cause the air to blow out the defrost. 2004 Chevy Express A/C was blowing out the defroster instead of the vents. Is it only the temperature of the air that changes with accelerating/coasting ? A lot of vehicles will have a vacuum accumulator tank somewhere. Comment; Flag; More. After i started accelerating, the flow through the vents slowed and finally stopped. Why does my 92 Ford Chateau club wagon AC blows through the defroster vents? The air flow controls are vacuum operated and if the vacuum is lost it shifts to the default or no-vacuum position which is to the defrost. I have a 1999 F 250. Sponsored Links JeepForum.com. When I lift off the gas, it comes out the vents again. Remove Advertisements. Also seen the vacume switching valve in the dash go bad as well. When I lift off the gas, it comes out the vents again. :VHOT: Any ideas guys? what causes this? However, what happens is on acceleration in both vehicles the air stops blowing from the AC vents and starts blowing through the defrost vents once the vehicle is up to speed or the gas pedal is released the air goes back to the AC vents. You have a leak in the air vacuum system that controls the air flappers. Protect Your RV Battery In Winter Storage. A/C blows from dash to defrost when accelerating. Other than that it works great and is ice cold. The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. Se if you can hear a vacume … My car has 197000 miles. Recommended Services. If cruise is on and ac is on any setting, and the engine is working hard, the ac blows only out the defrost. 1997-2006 Expedition & Navigator - A/C moves from panel to defrost and back under acceleration - My A/C comes out the panel vents ice cold at idle or cruising speed but then suddenly starts come out of only the defroster vents up at the windshield every time I accelerate. Dodge. Got in my car today and kicked on the AC. 2003 Crown Victoria: only blows..the defroster..vents..air comes. On my 1999 Dodge Ram, when accelerating with the A/C on, the air stops coming out the vent and comes out the defrost. Rinse and repeat. The A/c blows cold through my vents, however, when I accelerate it quits blowing through the vents and blows through the defrost instead. What to I need to start to look at?? Everything is smooth with no binding. 5 Related Answers Anonymous . Sponsored Links JeepForum.com. Does anyone know anything about this? Thanks. Hyundai Master Technician. Ac only blows through the defrost vents no matter what the controls are set to the air only comes out the defrost vents. This system will have a vacuum line coming off the intake going towards the firewall and thru to the control panel with a vacuum reservoir connected inline. It seems the fan is blowing but it is like something blocks the air passages when accelerating. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. 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I'm guessing that there is a default in the program that controls the HVAC. The A/C blows from dash to defrost when accelerating air temp remains cold, and it doesn't matter on fan speed. It was blowing out of the defrost vent and the floor??? If I baby the throttle then it doesn't happen as much, but again, if it does happen, I take my foot off the peddle and two seconds later all is well. Any reason why air only blows out the defrost vents? Ford, F-150, 2001, 74,000, and 5.4L. Print this page; Share this page × Ad. AlanY. What causes the front air conditioner on 1999 Lincoln navigator to stop blowing through the ac vents and start blowing through the defrost vents? You most likely have a broken plastic 1/8" line under the hood near the RH side of the engine that supplies the vacuum to the HVAC controls. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops. 1995 Ford F-150 AC blows out the defroster when accelerating hard. July 6, 2016, 1:59am #8. The AC blows through the dash vents just fine when crusing, but if I accelerate to pass someone or going up a hill, it starts blowing air through the defrost vents only. Or a problem. Want Answer 0. 1 - 18 of 18 Posts ... it blows cold air just fine but when i accelerate it starts blowing air out the defrost vents only....and that is just wizzing me off.! post #2 of 7 Old 06-16 … A quick search gave this for a 1998 Dodge, and does show a cannister. thru the defrost and when you let off the accelerator the the air starts blowing thru the front vents like it should. I tracked the vacuum lines to the vacuum actuator that changes the air flow from dash vents to the defroster and found no problems. When I step on the gas it blows through the defrost vents. By continuing to … when ever you accelerate or increase engine revs the air switches to defrost. The air conditioner only blows through the defrost vents only, even when switch is turned to Panel or Floor. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops. I have a 2004 ford explorer v8 4wd eddie bauer 4x4. I have manual locking hubs and when I engage 4x4 it works perfectly through the ESOF switch. Ford 7.3L Power Stroke (1999-2003) :: 2001 - AC Blows Only Through Defrost Vents. The accumulator ball on my 97 is located down behind the passenger side headlight, and I finally fixed my vaccum issues, turned out to be the 2 check valves, replaced them and it fixed all my problems, learned that fix from the dodge/mopar help site, very cheap and easy fix, hope this helps,,,,. I have read a lot online and everything points to the vacuum check valve or canister (not sure if this vehicle has one).

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