What is this?

patrickjcrum · Post by **patrickjcrum** » 31 Jul 2010, 17:05

1995 850Turbo, 143000 miles or so.
Can anyone tell me what this is? it looks like it's part of a sensor that may have broken off? I'm pretty sure it's part of the AC.

Thanks in advance!

Pat

Post by **JDS60R** » 31 Jul 2010, 19:05

Looks like someone replaced part 20 with something
See attached.

Post by **vegasjetskier** » 31 Jul 2010, 20:24

It looks like it might be part 44 or 45 with half of it broken off to me.

petek153 · Post by **petek153** » 31 Jul 2010, 20:41

pressure switch for AC FCP 1995-1997 Volvo 850 A/C Pressure Switch

http://www.fcpgroton.com/product-exec/p ... gory_id/66

Post by **JDS60R** » 31 Jul 2010, 21:06

I agree = looks like the pressure switch for the win

patrickjcrum · Post by **patrickjcrum** » 31 Jul 2010, 21:11

petek153 wrote:pressure switch for AC FCP 1995-1997 Volvo 850 A/C Pressure Switch

http://www.fcpgroton.com/product-exec/p ... gory_id/66

OK, Thanks! What does it do? if I put off replacing it what problems can I expect?
Cheers,
Pat

Post by **phils94850** » 01 Aug 2010, 05:14

basically its a safety feature if your a/c sys. pressure get to low or high it will shut the a/c compressor off.

Retired MVS Contributor · Post by **Retired MVS Contributor** » 01 Aug 2010, 08:06

It is the high pressure cut-off...The low pressure cut-off is near the firewall on the larger of the two A/C lines that go through the firewall...Thin line, high pressure...Thick line, low pressure...It is important because you have to order the right swich...

Retired MVS Contributor · Post by **Retired MVS Contributor** » 01 Aug 2010, 08:26

There must be an electrical connector swinging in the breeze somewhere in there...It will have the rest of that broken switch...I believe that switch is called a pressostat...

patrickjcrum · Post by **patrickjcrum** » 01 Aug 2010, 11:11

jerrymcc wrote:There must be an electrical connector swinging in the breeze somewhere in there...It will have the rest of that broken switch...I believe that switch is called a pressostat...

it's in the foreground of the 2nd pic, plugged into a dummy port (why it's there I have no clue!) I just put it there back when I changed my belt and noticed the switch was gone to avoid it just dangling loose.
Near as I can tell, It hasn't been there in a long time.