defroster vents
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Tuned
Joined: Jun 2008
Posts: 412
Likes: 0
From: sc
defroster vents
i have a problem that i hope that someone can help me with. everytime i turn on the defroster it stays coming out the front vents. the blend door seems loose to me & the vacum works while i'm looking at it. my truck is an 84 f150 with a/c any help will be appreciated greatly!!<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
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Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
Sounds like the link from the vacuum servo fell off or broke. I had the same on my 84 and its been some time since I fixed it. Check for vacuum to all servos you can get to. I recall with no vac to the controls its usually blows on defrost. The temp blend door is cable controlled not vacuum controlled.
Lead Driver
Joined: Dec 2002
Posts: 5,491
Likes: 16
From: Kuna ID
A popular part to fail on these trucks is the blend door. The hinge breaks and prevents it from going to the default position of defrost. Some have fixed it by installing small brass hinges. I chose to remove the dash ducting, and taped a piece of cardboard over the hole to direct the air. At least now I can choose between the floor and defrost. The A/C never worked and I dont care for the hot air blowing directly at me anyhow.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
A popular part to fail on these trucks is the blend door. The hinge breaks and prevents it from going to the default position of defrost. Some have fixed it by installing small brass hinges. I chose to remove the dash ducting, and taped a piece of cardboard over the hole to direct the air. At least now I can choose between the floor and defrost. The A/C never worked and I dont care for the hot air blowing directly at me anyhow.
I don't like hot air blowing in my face either so I stuffed rags in them!
-Enjoy
fh : )_~
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Tuned
Joined: Jun 2008
Posts: 412
Likes: 0
From: sc
Sounds like the link from the vacuum servo fell off or broke. I had the same on my 84 and its been some time since I fixed it. Check for vacuum to all servos you can get to. I recall with no vac to the controls its usually blows on defrost. The temp blend door is cable controlled not vacuum controlled.
thanks i'll look into this on my next day off. thanks guys for the info!!
Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
My 84 F250 only had heat option, I got all ducts and parts for AC, installed but never got the AC system working. I do rember that broken hinge now, but the vac lines were a pain as there was no diagrams for it. Once I get a better cab swapped over, the AC will work! Florida summers are getting hotter and hotter nowdays...
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Junior User
Joined: Jul 2004
Posts: 54
Likes: 1
From: Sioux Falls, SD
Sounds like the link from the vacuum servo fell off or broke. I had the same on my 84 and its been some time since I fixed it. Check for vacuum to all servos you can get to. I recall with no vac to the controls its usually blows on defrost. The temp blend door is cable controlled not vacuum controlled.
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Junior User
Joined: Jul 2004
Posts: 54
Likes: 1
From: Sioux Falls, SD
Eddiec1564 your cable op statement doesn't apply to A/C equiped trucks. ladelld33, I have the exact same issue and found the tin can (VRESER) is definately the problem, has a hole in it. Found this searching...
https://www.ford-trucks.com/forums/6...ce-can-go.html
https://www.ford-trucks.com/forums/6...ce-can-go.html
Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
Ok, that cable controls the heat blend door. The rest is vac controlled. Its been 10 or more years since I replaced my heat only dash ducts/control over to AC/heat ducts and controls. I do know on my 89 F250 truck it has the same system as the 84. But the 87 truck I stripped had only vac control going to the recir door only. The rest was cable operated. I had to replace the 89 dash as the prevous owner was a hack up repair guy, the 87 dash/ducts and AC control,main wire harness was installed to fix his mess.
I still have not found any diagrams for the vacuum system for the AC controls. Anybody have a factory manual to scan in for all of us here?
I still have not found any diagrams for the vacuum system for the AC controls. Anybody have a factory manual to scan in for all of us here?
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Tuned
Joined: Jun 2008
Posts: 412
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From: sc
fellas everything is connected so do you all think that if i service the ac the stuff will work? well i'll see this week cause my youngest can't ride with the windows down that's what the doc said anyway...allergies!
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