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06 V8 - AC Question

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
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Re: 06 V8 - AC Question

Post by neworleans » Sun Jul 28, 2019 7:49 pm

Hey guys,
I replaced the solenoid but it didn't make much difference :(
What is my next option? What you all think?

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Re: 06 V8 - AC Question

Post by MoVolvos » Sun Jul 28, 2019 11:29 pm

This the correct pressure for 134A.
100°F (38°C) 50-55 psi / 345-379 kPa 315-325 psi / 2172-2241 kPa

Air Conditioning Circuit and Cycle Diagram

I thought with the high side pressure being too low you might have an overcharged system. Could also be the compressor itself being it's used?
https://www.buyautoparts.com/howto/ac-p ... adings.htm

AC Compressor Pressure
High 250 Low 50

Problem with the Compressor
Overcharged system or condenser issue

Recharge system and inspect condenser for blockage


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Re: 06 V8 - AC Question

Post by oragex » Mon Jul 29, 2019 11:43 am

Maybe a stuck thermal expansion valve ? Who knows.. Meanwhile, this is what I do. Depending how you adjust it, it should blow colder air but at some point the venting may diminish - just turn it off 2 min then restart, or adjust the sensor to receive colder air

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