air only blows out defrost and foot vents...

perdue5.0 · March 7th, 2011, 12:34 PM

ok so this happened a long time ago and it hasnt really bothered me enough to try and fix it but now im bored and figure i can check it out..

no matter what setting i put the dial to, my heat and a/c only come out of the defrost and foot vents.. i dont really know how the switches make the air come out of the different vents and stuff so i was wondering if someone could tell me how they work and how i can fix this..

ryanw · March 7th, 2011, 01:40 PM

broken vacuum line. On your passenger side fire wall you will see a vacuum line coming out, it then travels across the fire wall to the drivers side vacuum tree ( i think) id check that line for brakes or if its rotted through in some spot

gripthenboost · March 7th, 2011, 01:43 PM

yup check vac line.

perdue5.0 · March 7th, 2011, 01:48 PM

ok cool thanks.. ill check it after work

95tbirdv8 · March 7th, 2011, 02:47 PM

i drove my car with that same problem for about 6 months, and my dad pointed out that vacuum line to me. it cost me $2 dollars to get a new one and fixed the problem. i told the previous owner and he said he had been riding around like that for 2 years, he was amazed by how easy it would have been to fix, lol.

perdue5.0 · March 7th, 2011, 02:49 PM

awesome!

perdue5.0 · March 7th, 2011, 03:01 PM

is there a picture anywhere, where somebody could show me exactly what line? i just ran out and looked and theres alot lol

tmoss · March 9th, 2011, 05:36 PM

diagrams can be found here:

Mustang FAQ - Wiring & Engine Info

dr.gonzo! · March 9th, 2011, 07:03 PM

hate to thread jack, but what if I have air out of the middle vents, just not the far left one, does that mean the tube has become disconnected? Dash has been off multiple times since I bought the car

fogged306 · March 9th, 2011, 09:02 PM

Originally Posted by dr.gonzo

hate to thread jack, but what if I have air out of the middle vents, just not the far left one, does that mean the tube has become disconnected? Dash has been off multiple times since I bought the car

Either that or it's blocked with something. If the dash has been off a bunch of times, I think you've got the right idea though, tube's probably not connected anymore.

tmoss · March 9th, 2011, 10:28 PM

one of the vacuum lines from the vacuum switch in the control panel could have been pulled off the vacuum motor that switched from your mode to the dash discharge mode. It's under the dash in the middle and the vacuum line color is yellow.

1989Gt. · March 9th, 2011, 11:23 PM

Not to thread jack again, but mine does this too, but sometimes the blinker wont work and when i turn on the vent it doesnt do anything either are they controlled by the same relays or something. Oh and my backup lights wont turn on too.

March 7th, 2011, 12:34 PM	#1
perdue5.0 Regular 1992 mustang lx 5.0 Join Date: Feb 2011 Location: washington Posts: 96 iTrader: 0 reviews	air only blows out defrost and foot vents... ok so this happened a long time ago and it hasnt really bothered me enough to try and fix it but now im bored and figure i can check it out.. no matter what setting i put the dial to, my heat and a/c only come out of the defrost and foot vents.. i dont really know how the switches make the air come out of the different vents and stuff so i was wondering if someone could tell me how they work and how i can fix this.. __________________ However, I thank you, for this pen and ink ammunition.. Thank you for the inspiration!

March 7th, 2011, 01:40 PM	#2
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,057 iTrader: 0 reviews	broken vacuum line. On your passenger side fire wall you will see a vacuum line coming out, it then travels across the fire wall to the drivers side vacuum tree ( i think) id check that line for brakes or if its rotted through in some spot __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

March 7th, 2011, 01:43 PM	#3
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	yup check vac line. __________________

March 7th, 2011, 01:48 PM	#4
perdue5.0 Regular 1992 mustang lx 5.0 Join Date: Feb 2011 Location: washington Posts: 96 iTrader: 0 reviews	ok cool thanks.. ill check it after work __________________ However, I thank you, for this pen and ink ammunition.. Thank you for the inspiration!

March 7th, 2011, 02:47 PM	#5
95tbirdv8 Enthusiast 1990 mustang gt Join Date: May 2010 Location: houston, tx Posts: 627 iTrader: 0 reviews	i drove my car with that same problem for about 6 months, and my dad pointed out that vacuum line to me. it cost me $2 dollars to get a new one and fixed the problem. i told the previous owner and he said he had been riding around like that for 2 years, he was amazed by how easy it would have been to fix, lol. __________________ Burning Rubber in the 5.0 http://www.youtube.com/watch?v=mKGSmRkKQcM95 95 mark8 lsc 95 tbird v8 90 mustang gt 07 silverado v8 08 yamaha r6 to be continued........ foxbodyperformance.com is the way to go

March 7th, 2011, 02:49 PM	#6
perdue5.0 Regular 1992 mustang lx 5.0 Join Date: Feb 2011 Location: washington Posts: 96 iTrader: 0 reviews	awesome! __________________ However, I thank you, for this pen and ink ammunition.. Thank you for the inspiration!

March 7th, 2011, 03:01 PM	#7
perdue5.0 Regular 1992 mustang lx 5.0 Join Date: Feb 2011 Location: washington Posts: 96 iTrader: 0 reviews	is there a picture anywhere, where somebody could show me exactly what line? i just ran out and looked and theres alot lol __________________ However, I thank you, for this pen and ink ammunition.. Thank you for the inspiration!

March 9th, 2011, 05:36 PM	#8
tmoss Regular Join Date: Jan 2007 Location: St Louis, Mo Posts: 382 iTrader: 0 reviews	diagrams can be found here: Mustang FAQ - Wiring & Engine Info __________________ 88 GT Vert 5spd, 3:73 gears, Explorer intake/65mm TB, Explorer Ps, Manley race 1.85/1.55 valves, 1.7/1.6 stud rockers, stock cam +4 degrees, MAC Jet-Hot coated shorties. 277RWHP/330RWTQ www.fastlanecars.com http://tmossporting.0catch.com/

March 9th, 2011, 10:28 PM	#11
tmoss Regular Join Date: Jan 2007 Location: St Louis, Mo Posts: 382 iTrader: 0 reviews	one of the vacuum lines from the vacuum switch in the control panel could have been pulled off the vacuum motor that switched from your mode to the dash discharge mode. It's under the dash in the middle and the vacuum line color is yellow. __________________ 88 GT Vert 5spd, 3:73 gears, Explorer intake/65mm TB, Explorer Ps, Manley race 1.85/1.55 valves, 1.7/1.6 stud rockers, stock cam +4 degrees, MAC Jet-Hot coated shorties. 277RWHP/330RWTQ www.fastlanecars.com http://tmossporting.0catch.com/

March 9th, 2011, 11:23 PM	#12
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	Not to thread jack again, but mine does this too, but sometimes the blinker wont work and when i turn on the vent it doesnt do anything either are they controlled by the same relays or something. Oh and my backup lights wont turn on too.

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

Threads Similar to: air only blows out defrost and foot vents...
Thread	Thread Starter	Forum	Replies	Last Post
when excelerating the ac cycle thro vents to defrost	strokedmustang66	5.0 Mustangs	2	June 30th, 2010 01:55 PM
Classic "vents on defrost" problem	Atlus	General Tech	1	October 18th, 2008 09:23 AM
what controls how hard it blows out of vents?	91cobra5.0	5.0 Mustangs	11	March 30th, 2008 11:02 PM
AC comes out defrost under accel.?	drumvudu	2.3 Mustangs	2	June 20th, 2007 08:49 PM

All times are GMT -4. The time now is 11:24 PM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.