Expansion tank valve?

[A80Avant]

http://www.autoairconparts.co.uk/Car...t-22-2309.html


where does this go??

[Pirvu Eugen]

That is the aircon orifice tube with filter.
Is at the evaporator feed pipe.

[A80Avant]

I have no idea.

sent using Android

[Pirvu Eugen]

throu this tube...the pressurised freon liquid goes through into evaporator...where evaporates and sucks the heat from the cabin.

[A80Avant]

is this the evaporator ?

http://www.autoairconparts.co.uk/Car...t-31-1172.html

or this?

http://www.autoairconparts.co.uk/Car...t-16-7364.html

[Pirvu Eugen]

no...first is the dryer....wich is under the front wing

[Pirvu Eugen]

evaporator is located inside the heater box.

[Pirvu Eugen]

http://www.google.ro/imgres?imgurl=http://www.onlineautomotive.co.uk/ProductImages/NS92144.jpg&imgrefurl=http://www.onlineautomotive.co.uk/Audi_RS2_Evaporators.aspx&usg=__CK0lV9_qzTDMit3UB2p94mT0hQY=&h=400&w=600&sz=40&hl=ro&start=1&zoom=1&tbnid=KS1PautLUNvc1M:&tbnh=90&tbnw=135&ei=5aIAT9uWOYXJsgbsxewI&prev=/search%3Fq%3Daudi%2Brs2%2Bevaporator%26hl%3Dro%26sa%3DX%26gbv%3D2%26tbm%3Disch%26prmd%3Divns&itbs=1

This is the evaporator

[A80Avant]

aha, i see!

can this valve be a cause of the AC not working? even though it is charged up?

[Pirvu Eugen]

is possible...iff that orrifice tube is blocked...will give you high pressure error.
You have pull the codes from the ac?

[johne]

If you follow the aircon pipe/hose from the top of the radiator inside the engine compartment it leads back to the bulkhead where it joins the aircon connector on the bulkhead. If you come back 30cm from the bulkhead connector to where the pipe passes the driveshaft you'll find a union in the pipe. The part you've listed which is known as the restrictor sits inside the pipe at that union.

It's the restrictor that actually "makes" the coldness in the aircon as the hot R134 liquid is turned into a cold gas at that point.

John

[A80Avant]

John, i wish i was living somewhere closer to you when it comes to A/C problems.... haha

no codes on the air con im afraid and im a bit lazy getting that thermal sensor replaced...

[johne]

is possible...iff that orrifice tube is blocked...will give you high pressure error.
You have pull the codes from the ac?

There are no codes on the A/C. You'd have to use a dual pressure gauge hooked up to both the high and low side to reliably diagnose a blocked restrictor.

You could infer a blocked restrictor if as soon as the compressor kicks in the high speed radiator fan kicks in momentarily followed by the compressor cutting off.

John

[A80Avant]

i see
well my compressor doesnt kick in at all, so i presume the problem would be elsewhere

[Pirvu Eugen]

Maibe i am wrong..but...if the outside temperature is lower....the compressor is not engaged...dosint need to cool something wich is allready cool..no?