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Pressostat o-ring

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

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Sveedy
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Pressostat o-ring

Post by Sveedy » Sat Jun 13, 2020 2:53 pm

I discovered that my AC low pressure switch ( pressostat # 9171700 ) was bad and I ordered a new one, without realizing that there is an o-ring under it. I have searched and found the master list but I didn't see it listed as that. Are they listed/sold by size ?
Looks like I'm going to be without AC because of a teeny tiny o-ring :(
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Re: Pressostat o-ring

Post by scot850 » Sat Jun 13, 2020 4:47 pm

Sorry, but I am not clear on this Sveedy. Did you buy an OE part or aftermarket? I don't recall what is in the OE kit as it has been a few years since I bought one.

Neil.
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Re: Pressostat o-ring

Post by Sveedy » Sat Jun 13, 2020 5:20 pm

Thanks Neil
I bought a AC low pressure switch from FCP because I thought that was what I had. Volvo part. No problem there except that when I received it, the pipe size was off. Apparently I have a pressostat, not a low pressure switch. When I took off the switch, which I didn't do before I ordered it because I thought I'd loose all the freon, I saw an o-ring. I see one on FCP but if it's for the low pressure switch then that won't work. It's listed as 12 x 8 mm.
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Re: Pressostat o-ring

Post by abscate » Sat Jun 13, 2020 8:28 pm

I’ve got a couple of AC P80 systems apart so I can measure these
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