The front a/c on my ex on the highest blower motor speed blows out the vents like its on low, but I can hear the motor blowing at full speed. It's not blowing out of defrost or floor unless I switch it. On lower settings I can barely feel any air at all. Only does this rarely. Could it be my vacuum pump?
View 4 Replies1998 F150 XLT 4.6l automatic,,,
Drove the truck on a trip the other day, about 650 miles with a loaded 5x8 trailer in tow. A/C started acting weird. When the truck was on level ground, or going down hill, the A/C was fine. Cold air coming out the correct dash vents. As soon as I started up hill, or put the truck under strain of acceleration, the A/C would stop blowing out the dash vents and would start coming out the floor or defrost vents, or just not come out anywhere.
When I turned the A/C off and just used the vent setting, it would do the same thing with the fresh air. I guessing this has something to do with my vacuum lines, somewhere. What I should be looking for and where?
my AC is only blowing through the defrost and the floor - It's a cool 101 degrees here today!!
We have changed out the battery, the actuator on the passenger AND driver side, as well as pulling the HVAC fuse from the fuse box under the rear seat - none of this has worked!
Ok have and 2001 excursion v10 auto the make good heat but when you start to like climb a hill it alternates between the floor and defrost then when you knoll the hill it goes back to the vent heat. I guessing a vacuum problem.
View 6 RepliesI'm not sure if on my 2002 Excursion limited the air vents are controlled thru vacuum or electronically. Where to start. Where to even begin looking to correct this problem. I'd rather not have to pay the dealer prices unless it is something out of my league of fixing.
View 4 RepliesMy 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.
Ok, I know I have a vaccum leak. I have manual hubs now and those lines are capped. The AC is blowing through the deforst and the pump is running non stop. I have replaced the vac pump a couple of years ago and it worked fine then. any other places to look?
View 1 RepliesI have a 2001 Mercury Grand Marquis and the A/C will not blow out of the vents. It is blowing cold air, but will only blow from the floor and defrost.
View 3 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 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 RepliesMy 06 F250 crew with the 6.0 starting blowing the cold AC out the defrost vent and will not switch to the dash vents. It's goning to hit 108 today and stay around 105 for the rest of the week.
View 14 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 RepliesMy 2005 Freestar (not the Freestyle) a/c is working properly except that it is only blowing through the defrost. I've read other posts about it being a leaking vacuum system on other ford vehicles that cause this problem.
1) I'd like to confirm that this Freestar a/c works on a vacuum system to open the a/c duct doors.
2) If it is, where are the vacuum hoses located? I'd like to check them to see if they are connected or if they have a hole.
Every thing was working great then the AC quit. I ran through the air selector and all I can get is panel and defrost with no heat. I checked the vacuum line on the passenger side engine compartment and it looks good. Oh I also took the control apart and 3 of the five holes had vacuum to them.
View 2 RepliesReplaced the vacuum solenoid.. Thought that would fix the ac blowing threw the defrost when I switch to 4x4, but didn't fix the issue, 4x4 works great. There is another little diaphragm that has a vacuum line to it that opens and closes, could this be causing the air to go defrost? I'm going to go to a buddies house and test for leaks this Saturday, just trying to get a jump on it...
View 1 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.
My AC blows hot air, like heater hot, but the defrost on cold blows cold air. At first the AC would cut out at low rpm's (stop sign or red light) and cut back on, now its nothing. But the defrost blowing cold, enough to fog up the windshield, tells me its not the compressor or freon.
View 2 RepliesI have followed the vacuum lines but don't see any holes or cracked lines. I dont have the ESOF hubs so that is ruled out. Also checked the connector on the vacuum pump to make sure it still had power. Everybody says that when I turn the key to acc I should hear the vacuum pump running. I don't or do I feel it moving. Am I on the right track? I don't want to replace if not bad. Do all vacuum pumps run on keyed power? I honestly don't remember hearing it run before but that doesn't mean anything with my memory.
View 8 RepliesAs 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 RepliesHave 06 super duty . Heater air blowing only on defrost. 4wheel drive. Is this a vacuum problem or some type of sensor or control problem?
View 2 RepliesMy husband and I have 3 Excursions, V10, 6.0, 7.3 and I have a 6.0 250 crewcab. 3 of the 4 now blow air or heat from just the defroster unless your going at a slow speed.
View 2 Replies