ac only blowing out the defroster .. bad FUSE? - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 07-09-2005
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ac only blowing out the defroster .. bad FUSE?

had my ac looked at all the vacuum lines are hooked up and not leaking, i checked every thing throughly., could it be a blown fuse maybe? if so i do not have my manual(didnt come with the truck) could someone tell me which fuse it is? i really dont want to pull every fuse its a 99 xlt 4x4 3.0
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Old 07-09-2005
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i dont think that would be a fuse did you check all of the vacuum line?
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  #3  
Old 07-09-2005
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yeah, i checked everything.. cant hear a leak, everything is connected

it goes from hot to cold. and from high to low. just the location wont change from the defroster. could it be the hvac control module inside the truck
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  #4  
Old 07-09-2005
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i went and had a guy look at it. he said it looked like all the lines were connected, but he said he thought the problem would be under the radiator overflow tank the windshield washer fluid. said he would charge 25 bucks an hour to fix it i would like to try and fix it myself, if you guys could guide me in the right direction
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Old 07-09-2005
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you may be able to fix it yourself but messing with the ac can be risky. you have to be careful with it and it will need to be recharged after you are done.

cant figure out wuts under the resevoirs. this is a vacuum problem, the problem just needs to be found.
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Old 07-09-2005
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ya i dunno what would be under the overflow tank....I think you should replace the lines and see what happens you can get those from pep boys dirt cheap
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  #7  
Old 07-09-2005
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have you checked behind the HVAC itself?(controls in the cab). maybe something was knocked loose.

id double check EVERYTHING. you dont know how well that guy gave your truck a look over. he did suggest something under the overflow tank after all.
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  #8  
Old 07-09-2005
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no i havent looked. i thought it was just a electronic clip on the bakc of it. if so how do i get to it? just pop the black bezel off and go from there?
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  #9  
Old 07-09-2005
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youll have to pop the bezel off and remove the radio.

radio can be removed with flathead screwdriver if you know wut youre doing or you can purchase the tools from wal-mart for $10.
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  #10  
Old 07-09-2005
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yeah i have the tools... i guess ill try that and see what happens
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  #11  
Old 07-09-2005
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99% chance its a vacuum line off, melted etc... most likely under the hood

Could also be a bigger vacuum problem such as a cracked vacuum... resivior (sp?)

Last thing.. a vacuum line could be off in the dash... (unless the dash has been apart I would doubt it)


I had this exact problem.. it was vacuum line off from gay firestone tech...
Rand
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Old 07-09-2005
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i dont think its a vacuum line since it ranges from hot to cold and high to low. if it was a vac. line it'll default to defrost heat only. sounds like the blendor isnt moving. i dont know what the newer ranger use for acuation, either cable or some kinda pulse vacuum thing a mig jig but thats what it is.
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  #13  
Old 07-09-2005
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Quote:
Originally Posted by optikal illushun
i dont think its a vacuum line since it ranges from hot to cold and high to low. if it was a vac. line it'll default to defrost heat only. sounds like the blendor isnt moving. i dont know what the newer ranger use for acuation, either cable or some kinda pulse vacuum thing a mig jig but thats what it is.

this makes sense.. so what do i do to fix it? i dont really want to take it some place and get raped on 25 bucks an hour, if i can do it myself
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  #14  
Old 07-09-2005
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You have a vacuum leak! Any time there is a vacuum leak in the hvac system it defaults to defrost and yes your a/c and heat will still work this way just only on the defrost vents. Your blend door is electronically controled. has nothing to do with the vacuum lines!
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  #15  
Old 07-09-2005
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thats as far as i can help for now buddy. wheres bob when ya need him. maybe check www.autozone.com under the online repair manual part and see if it has a diagram or something for the blendor. i dont have a repair manual or anything for the newer rangers.
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  #16  
Old 07-09-2005
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well i checked uneder the dash its fine. the guy i had look at it hooked up a pressure guage to the vacuum line, and he said it didnt have enough pressure as it should. he said he could fix it but it would take awhile. he said he thought it was coming from maybe the round ball?
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  #17  
Old 07-09-2005
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i am 99.9% positive when a vacuum leak is in the system it'll default to full heat defrost only.

but u never did say if the AC did work...but what does that have to do with it or am i missing something here?
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  #18  
Old 07-10-2005
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It doesnt default to heat. The blend door is seperate and either
manually(cable) or electronically actuated.

The vent control is vacuum actuated and if you have no vacuum it defaults to Defrost. Even if you have it in off.. you will have air coming out defrost going
down the road.
ASK ME HOW I KNOW!. :)

Rand
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  #19  
Old 07-10-2005
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Theres a ball under, where you were talking about. Dont know the name of it right now. But its a sphere, and some how, that stupid ball controls the doors. Mine busted, and had to be replaced.
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  #20  
Old 07-10-2005
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yep, if youre not getting enough vacuum in the line then that ball has a leak in it somewhere. that means it needs to be replaced.
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  #21  
Old 07-10-2005
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anyone know how much that ball will cost?
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  #22  
Old 07-10-2005
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Not much, its plastic... like 15 max...
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  #23  
Old 07-10-2005
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any progress?
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  #24  
Old 07-11-2005
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eh its raining like a **** today here in indiana. and hte mach 1 is in my garage and dont wanna take it out in all the rain. does anyone know the name of that ball? i need to call and try to find one.
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