A/C Low Pressure Port Location '08 XC70
 

I have searched the forums and the web and have had zero luck in tracking down correct information on where the low pressure port is located on my 2008 XC70, i am posting hoping I might get some more recent experinces and info from folks here.

I have read that it may be under the power steering and radiator fluid overflow, so I pulled both of those out, no luck. I have tried to follow the larger diameter ac tube from the compressor to the firewall and am just not seeing it.

Anyone have any info on where it may be on a 2008 xc70? I really don't want to take it to the shop until I can get a reading on the pressure to know if it is as simple as more refrigerant is needed.

Thanks!
2008 XC70 3.2
Roseburg, Oregon

Under the cowl cover

Ding, ding, ding, Winner! ES6T, thank you for that, I went out and pulled up the cowling and sure enough, there it is on the passenger side.

Thank you for the awesome help!

Photo Please
 

Hi.

I have the same 2008 Volvo XC70. I removed the cowl cover to look for the low pressure service valve, but no luck. Can you post a photo of exactly where this is found?

I've traced the larger diameter hose unsuccessfully from the compressor to the firewall. I could sure use a photo or two to help me in the right area.

Thanks.

Sorry, I have the car so can't get a picture for you. It is interesting how much the location varies in these cars.

As soon as I lifted the windshield wiper cowling from the passenger side the low pressure valve was right there. No more than 10" in from the fender toward the center of the car. Hope you find it, although it turned out that my compressor was bad so had to replace it. Waa not as wxpensive as I thought it wpuld be, $850

Thanks RussellTA,

I'll try to remove the windshield wiper cowling and see if that reveals it.

In case this helps anyone that comes across this thread. The key to finding the low pressure port is to remove the plastic cover that is directly over the firewall. This wasn't too obvious to me.

It's the cowling that covers the windshield wiper motors. It's held in place by 4 or 5 autobody clips. On the XC70, you need to remove the rubber weather strip that covers the battery cover, and the cowling and runs the full width of the engine compartment. With the weather strip removed, you can pry up the autobody clips (carefully).

Then you can access the low pressure port directly in front of the passenger compartment (under the plastic cover). The photo shows the hose connected to the http://i67.tinypic.com/2jfc8ib.jpg

This next photo shows the cowling lifted up with the hose connected.
http://i63.tinypic.com/2wfsjms.jpg

Yep, that's it. What did you remove when you first said you removed the cowl cover but it wasn't there?

I removed the engine cowl.

07 xc70
 

In case anyone is still searching for this. 07 XC70, just removed the cowl after reading this and couldn't see **** in there, found it under the power steering fluid reservoir which lifted straight up and unclipped a hose to move it out of the way

This is because you have a 2007 and the original post is for a 2008. In North America 2008 was a different generation/platform from the 2007. So a change in location should not be surprising.

PS not posting this to be a jerk. Just saying.

Not sure about the model changes in the US, as I'm from The Netherlands. But I have a 2008 XC70 5 cil. diesel, that's likely the same model. The P3 Volvo.

https://cimg2.ibsrv.net/gimg/volvofo...d760ae58e0.jpg


I've been looking for this pressure switch, but I can only find a pressure sensor (3-wire). In Vida I see that this sensor measures the high pressure value (if I unplug it, the pressure value in Vida drops to 0), it does not simply switch above or below a certain pressure. Could it be that my model does not use a pressure switch, but uses the measured pressure to determine if the pressure is correct?

The sensor I found is position 26 in the image below of the 'delivery line'. The part number is 31292004
https://cimg8.ibsrv.net/gimg/volvofo...07fa3bf761.png


In my case the pressure it shows around 2000 hPa, which seems rather high for the outside temperature of around 75°F (24°C). And I see that the AC pump is not switched on, although I am able to switch it on manually in Vida (so the electrics, and clutch are ok).

2008 xc70 low pressure a/c port
 

https://cimg9.ibsrv.net/gimg/volvofo...6ce5373cef.jpg
Low pressure a/c 2008 xc70
https://cimg6.ibsrv.net/gimg/volvofo...52d723fcc8.jpg
Low pressure a/c port 2008 xc70