I recently found out that my check valve needs replacing for my a/c vacuum. The problem came from when I turn my AC on, the panel vents do not work. Instead, the Defrost vents push the AC air out. How to replace the vacuum check valve? I would like to avoid the high cost of dealership prices.
View 14 RepliesNo matter what I do with the settings for my heater in my lariat air only blows out of the dash vents. Defrost and floor vents don't work it still blows hot air out of the dash vents. I'm not sure what the deal is maybe the vacuum system? I did a search and all I could find was people having trouble with air ONLY blowing out of the defroster and my case is just the opposite.
View 8 RepliesThe floor and defrost vents work. It just stays on defrost when you try to use the dash vents. The actuator seems to be working fine. I can watch the arm move through all the motions. and I cant find ANY vacuum leaks. Yes I looked at the hubs and under the hood. May be moving to alaska and kind of need my heater to work properly. . . .
View 5 RepliesI have a 2001 E150 and when i turn the AC/heat/air on it will only come out the defrost vents. Whenever i flip the switch left or right nothing comes out, but when i put it on defrost it works... but only through the defrost vents....
View 5 RepliesI have a 2002 SuperCrew - I've recharged the coolant - I can fill the air coming from the top defrost vents.
No matter what button I press on the air controls and can't get the air to switch to the vents. What the problem could be?
My 02 V-10 Ex seems to be blowing Air from the front vents up to the Defrost unless it go through a series of events-- Hit Auto then forward Air then the fan has to be a 4 only. It will blow forward vents then go back and forth from theirr to the defrost. Also the Temp seems to be much hotter then it should.
Took a interstate trip this weekend though and it seems to blow much colder and do a little bit better staying in the front vents however still goes back and forth. Im in FL and its HOT!!!! The only thing I know is that its a vacuum system.. and that again its HOT in the truck as a daily driver.
On my new to me 02 Mountaineer, the a/c and heater air on my climate control system is acting up. Everything is working as it should, except that when you direct air to the floor, the air comes out the defrost vents. I took the glove box out and when looking from the passenger floor towards the center, I can see 2 actuators that seem to be working. I was wondering if there were more than 2 of them, maybe one on the drivers side that I am not seeing, Didn't know that if maybe when one closed that another one would open elsewhere. As I said everything else is working as it should. Also the recirculation door is working as it should. Something else that I noticed is that the top port(#6) on the row of the vacuum hose plug does not have a line on it. Where I can get a diagram or picture of the hvac system.
View 5 Replies1994 f150. When i use the max a/c setting, sometimes after a few minutes I hear a little thud and then all the air starts coming out of the defrost vents. This doesn't happen when using the regular a/c setting.
View 2 RepliesI have a 2002 Ex with the 7.3. Every time I put it into 4x4, the A/C automatically switches to the windshield defrost vents. After a couple minutes it switches back the the A/C vents. I'm assuming that isn't normal.
View 12 RepliesI have a 2010 f-150. Started having issues with the blend door actuator located behind the radio so replaced that a couple months ago and fixed issue. Now the a/c will only blow through the defrost and floor vents. I replaced the lower blend door actuator thinking that might be the culprit, but did not fix the problem. What the solution might be.
View 3 RepliesWhen the blower is on, it automatically switches from vents to defrost vents on its on. Does it about every 4 minutes.... like it's haunted. Curious if this is something i can tackle or do i need to take it in...
View 7 RepliesMy A/C is blowing cold but only thru the defrost vents. First it was blowing normally from the dash but during acceleration or under load, the a/c would randomly blow from any vent, from the floor, dash, defrost. Now that stopped and it only blows from the defrost vents above the dash-board.
1997 F-150 XLT, 4.2 Liter, V6, manual transmission.
I just picked up a 78 F150 Ranger XLT with a 351M in it this past friday. I am absolutely in LOVE with her. She is a great solid truck. One issue I am having though is that she blows hot air out the vents over the hump but nothing is coming out the top of the dash. I am guessing that i will have to take the dash off and clean out the box check the door etc. What did you do to rectify?
View 3 RepliesMy nav. when I put the air cond on auto and lower the temp so the air comes on, it blows out the vents on the front of the dash like it should and is cold. Then after about 30 seconds give or take, I hear a door deep inside the dash shut, or open, then the cold air only comes out the dash vents that are the defrosters for the windshield.
Then I can make it go back to the front vents again by pushing the button on the heater control to make the cold air come out the front vents again, but then it does the same thing again. Whats going to need to be replaced/repaired?
I have a vacuum leak. That's clear. When I put the truck in 4WD the air vents to the defrost after a slow (15-20 s) transition. The only way I can get the air to come back to the dash vents is to disengage 4x4. Of course, the auto-lockers aren't working. I can trouble shoot the vacuum lines and find the leak. No big deal.
I've isolated it downstream of the vacuum reservoir. It could be the PVH solenoid but at least the reservoir side holds pressure.
My concern is the noticeably poor A/C performance. It cycles between kinda cool and kinda warm. I remember the A/C being ice cold a few weeks ago.
Could the vacuum leak in 4x4 vacuum lines be related to the A/C problems? I'm thinking blend door vacuum issues. But I can't even find the blend door vacuum lines.
How do I know if my blend door is fully open/closed? Are there any other place to look that can cut down on my troubleshooting?
I have a different issue than the typical heat on max ac. Mine is actually cold, it just sends all the air to the defrost vents when i apply the throttle. Comes back to the dash vents when I let off the gas.
I know that it's vacuum lines or solenoid, I just wanted to see if any guess on which specific line to check or any other info since I do NOT have a gauge to measure the vac lines for pressure.
As the title implies, that is my problem. Can't get the AC to come out of anywhere other than the windshield defrost vents. Y'all ever encountered this before?
View 4 RepliesI have a 2012 super duty with a 6.2 in it. I bought it last winter and noticed no air getting to the defrost vents. Now in the heat, sometimes when I turn the air on, all I get is super hot air like the heater. Sometimes playing a bit will work but not always.
View 7 RepliesSo in the past week only on certain days I have lost my ability to change zones for where my nice refreshing cold air blows on me from. It only blows out of the defrost vents. I here a fluttering noise under the dash when this happens. Also under the hood where all the AC hoses and such are located I feel cold air coming from inside the black box just next to what looks like the blower fan assembly. I don't believe I should be feeling that.
View 5 RepliesMy wife's '02 Explorer has developed an issue with the heat/AC. As far as I can tell, the heat is hot when it's supposed to be hot, and the AC is cold when it's supposed to be cold. But, the problem is that everything only blows out through the defrost vents, no matter what setting it is on.
I know there are other threads on this type of subject, and I have read a lot of them. I thought I had identified that actuator gizmo as the culprit, but the more I read, it didn't seem like the symptoms for that issue are exactly like mine. I want to try and fix it myself, and I'd love to take the time to read everything on the subject, but warmer weather is here and my wife wants it fixed yesterday!
This problem reminds me of the time the vacuum pump went out on my F-350 and the defrost vents were all that would work. I wish this problem would be as easy to fix as that was.
My 02 Mountaineer doesn't have any air flow volume out of the heat, defrost, or a/c vents. The temp will change from hot to cold and the air direction will also change from floor, dash, windshield, etc. The a/c recirculation door also seems to be working. The fan sounds as it is running very fast, just not putting out any volume. What should I look for?
View 3 Replies