AC freon VALVE? WHERE IS IT

**INFAMOUS9986** · 04-23-2008 08:58 AM

I have a 96 Audi a4 I found the valve that has the H but I need to find the other one so I can Recharge the whole system. Looked high and low going crazy. I know its got to be in right in front of me

. Can anyone help me out?

**onemoremile** · 04-23-2008 09:09 AM

Under the false firewall cover near the cabin air filter and battery.

**Militant-Grunt** · 04-23-2008 10:11 AM

If you're in front of the engine bay its top left, two black caps. the refill cap will only fit one of those valves.

**Urbndevelopmnt** · 04-23-2008 11:29 AM

No, for the 96 (I just went through this fiasco) the low pressure is behind the false wirewall,By the cabin air filter. but there is a switch attatched to it,you have to remove the switch and use that, The high pressure is in front of the rad With a black cap on itto the left (If you are facing the rad)
so...When they refilled my gas they had to do something to the hose to get it to work on there, but it did.
I have no idea why the 96 is like this, but it is.

**mohsinic** · 04-26-2008 11:39 PM

hey can u find out what they did cause i usually just use my high valve but I think my evaporator is leaking so i'm going to change that out but i would need to put in freon after that and the shops I toke it to couldn't figure anything out they just used the high side by the radiator. I have the same 96 A4. I figured you had to do something with the Low Pressure Switch but couldn't figure out what

**INFAMOUS9986** · 04-27-2008 07:59 AM

yeah I ended up finding the low valve but the freon attachment I had didnt fit so I went to the auto and bought an adapter kit which Im going to put on in an hour. You put it threw the high side? I was told not to do it that way, as to why I dont know, but was stressed to find the low valve. Ill let you know if the attachment works.

**Urbndevelopmnt** · 04-27-2008 03:34 PM

You have to make the stem stick out more,then you can screw it on,after you unscrew the switch. thats how i got mine to work.

**mohsinic** · 04-27-2008 07:46 PM

okay i will deff. try that thanks. Can u just pull it wid a nose plier? and then fit the low side port on it

**Urbndevelopmnt** · 04-28-2008 01:01 PM

the hose i used i used needle nose pliers and uncrewed the stem some so it stuck out more, dont know what yours is like.

**bmags88** · 06-11-2008 11:24 AM

Anyone know where to find it on a B6?

**Jordyn** · 07-15-2015 01:29 AM

I had to take it in and have them put a low pressure Port on my low pressure hose because other then THered be no way wouldbw had to take to Audi get serviced