MAX AC ASSIST: AC Control Valve QUESTION - Ford Powerstroke Diesel Forum
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  #1  
Old 06-16-2010, 03:23 PM
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MAX AC ASSIST: AC Control Valve QUESTION

http://www.dieselsite.com/index.asp?...PROD&ProdID=21

Does this only work on MAX AC? I would want to to shut it off on non recirc and recirculated AC.
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Old 06-16-2010, 03:36 PM
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Funny, I was just on Bob's site looking at this not 30 seconds ago.
It looks like it only activates and shuts off coolant to the heater core in the MAX setting. I agree it would be nice to work on the non recirculated air too, but I don't think it does.

Anybody who have this want to comment on how much colder the air gets?

Sorry for the slight hijack
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Old 06-16-2010, 05:23 PM
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these valves work good. my truck has it and it gets noticeably colder on max a/c. i thought all super duties got this valve, but i was corrected. i put this on my 90 and it made a difference.
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Old 06-16-2010, 05:27 PM
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Think there is any way to make it work when you want it too?
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Old 06-16-2010, 05:36 PM
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it just uses vacuum to open and close the valve. if you wanted to route in a switch to a vacuum source, you could turn it on any way you want. if you dont want to fab anything, the vacuum source is only there on max a/c....
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Old 06-16-2010, 07:16 PM
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i have a few buddies who put an inline valve on the heater hose... they have no problems so far and works in both settings.
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Old 06-17-2010, 04:03 AM
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I did this to mine & def made A/C better. If you want to make valve close in all the pos left of the floor/def you put the T in the red vac line at the plug behind the glovebox. I tried it that way but ended up just using the white vac line right at the vac cannister just above the carpet on pass side, there is a rubber plug right there to go through the firewall. Used NAPA part # BK6601866 valve in the hose that goes from pass head to heater core. Ford-Trucks.com has a huge thread with several diff ways to do this.
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Old 06-17-2010, 09:52 AM
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I installed one last weekend and definitely made a difference. I only use Max ac anyways. Another great product from DieselSite
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Old 06-24-2010, 10:05 PM
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i stand corrected. i just checked and i do not have this valve...... another thing to add to the to do list.
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