cabin air circulation bypass
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Senior User
Joined: Jan 2007
Posts: 132
Likes: 0
From: Israel
cabin air circulation bypass
sick of smelling old car exhausts, and getting dust when 4x4ing...
Is there a way to bypass the "Max A/C" ****, so that I can get the air to circulate instead of outside air comming through the vents when using other fan outputs such as feet/front/windshield ?
i mean: Does anyone have the wiring diagram for the A/C to see what color wire needs 12V to change the air intake deflector for circulation?
Eysham
Is there a way to bypass the "Max A/C" ****, so that I can get the air to circulate instead of outside air comming through the vents when using other fan outputs such as feet/front/windshield ?
i mean: Does anyone have the wiring diagram for the A/C to see what color wire needs 12V to change the air intake deflector for circulation?
Eysham
Senior User
Joined: Feb 2001
Posts: 135
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From: Morgan Hill, CA
The vacuum comes from the engine on a gas motor or a vacuum pump on a deiesel. When you move the **** to Max, you are changing a valve that applies or removes vacuum to a diaphram that moves a door. If you look above where the passenger's feet go, there is a rubber hose there that possibly is the recirc. door (i never checked it myself...) Play with that and let us know what you find.
mike
mike
Laughing Gas
Joined: Nov 2004
Posts: 790
Likes: 35
From: Austin
recirculation
Did you ever find a solution for this? It's always amazed me that japanaese car have had the button or lever for "fresh" or "recirculatin" for like 25 years and American cars have never bothered to add this much needed feature.
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Sit. Stay.
Joined: Oct 2001
Posts: 18,308
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From: Washington State
Not exactly true. My Chevy has a re-circulate button so does the F-150. HOWEVER, NONE and I mean NONE work on the defrost position or the foot position. Problem is the intake for the recirculate function is usually right about the passenger's feet. Any moisture from melting snow, rain, puddles etc. is then pulled in too. That can create condensation on the windows and cause visibility problems.
If you're gonna try and change it. Start thinking relays and a stand alone switch. Might be the easiest way to trigger that vacuum pulse switch.
Why don't you just use the MAX A/C function? It is the most efficient position for the AC. Is that you want the air coming out of a different vent??
If you're gonna try and change it. Start thinking relays and a stand alone switch. Might be the easiest way to trigger that vacuum pulse switch.
Why don't you just use the MAX A/C function? It is the most efficient position for the AC. Is that you want the air coming out of a different vent??
Last edited by Monsta; Apr 9, 2007 at 07:53 PM.
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Thread Starter
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Senior User
Joined: Jan 2007
Posts: 132
Likes: 0
From: Israel
A/C ****
after a few japs and euros, this is the 1st American car i own.
the 1st was a 1978 Alfa Romeo.
All of them had this feature to select intake position reguardless of the output direction. none had a problem with it.
now, I thought about putting an electrical switch, connected to a solonoid relay, to open/close the right vaccum pipe.
the only thing is that i havn't yet to discover the correct vac pipe color/location.
any enlightments?
Eysham
the 1st was a 1978 Alfa Romeo.
All of them had this feature to select intake position reguardless of the output direction. none had a problem with it.
now, I thought about putting an electrical switch, connected to a solonoid relay, to open/close the right vaccum pipe.
the only thing is that i havn't yet to discover the correct vac pipe color/location.
any enlightments?
Eysham
Senior User
Joined: Feb 2001
Posts: 135
Likes: 0
From: Morgan Hill, CA
Have to disagree with you a bit, eysham & bigtexan, I think the US car makers have the right idea- the average driver is fairly ignorant about things technical, and the car companies know it. I cannot tell you how many Toyotas and Hondas I see driving around here on a mild day with their windows fogging up! I think that making defrost automatically go to outside air and turn on the ac compressor is a better way to go with the average driver in mind.
In your case, you need to look for a vacuum line over by the passenger's side foot well. IIRC, it is black with a white stripe. Experiment with that one, and get a 3 way air valve- you can get ones that look like a toggle switch.
mike
In your case, you need to look for a vacuum line over by the passenger's side foot well. IIRC, it is black with a white stripe. Experiment with that one, and get a 3 way air valve- you can get ones that look like a toggle switch.
mike
Originally Posted by eysham
after a few japs and euros, this is the 1st American car i own.
the 1st was a 1978 Alfa Romeo.
All of them had this feature to select intake position reguardless of the output direction. none had a problem with it.
now, I thought about putting an electrical switch, connected to a solonoid relay, to open/close the right vaccum pipe.
the only thing is that i havn't yet to discover the correct vac pipe color/location.
any enlightments?
Eysham
the 1st was a 1978 Alfa Romeo.
All of them had this feature to select intake position reguardless of the output direction. none had a problem with it.
now, I thought about putting an electrical switch, connected to a solonoid relay, to open/close the right vaccum pipe.
the only thing is that i havn't yet to discover the correct vac pipe color/location.
any enlightments?
Eysham
Last edited by lugnut; Apr 12, 2007 at 01:29 PM.
Senior User
Joined: Feb 2001
Posts: 135
Likes: 0
From: Morgan Hill, CA
Thats right- FTE - Where ALL the users are above average!
Originally Posted by eysham
lugnut...I guess that makes me above avarage...
thanks for the info, i'll look into it this weekend.
Eysham
thanks for the info, i'll look into it this weekend.
Eysham
