Re: Need AC pressure specs - Saab 9-5 Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 5/28: SAAB Evolutions/TSN T-Shirts $14 | 5/23: SOC Day Pass Winners Announceed
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

95 Bulletin Board
1999-2009 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main 95 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: Need AC pressure specs
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by 2000AERO [Email] (more from 2000AERO) on Sun, 18 Jul 2010 23:50:44 Share Post by Email
In Reply to: Need AC pressure specs, jb928, Sun, 18 Jul 2010 22:33:15
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

The compressor on the 9-5 is variable capacity. According to the WIS it tries to maintain a suction pressure of 2.6 bar - 37.7psi. (Although when I measured mine, it was running a bit lower - in the low 30's).

The high side pressure is very dependent on the ambient temperature and the load on the A/C system. I don't recall my measured high side at the moment, but according to the WIS the low speed cooling fan starts at 130psi, and it switches to high speed at 261 psi. On a hot day (85 degrees), with recirculate on and the interior fan at max, my cooling fans are running about 75% of the time on high speed and 25% on low speed. This should mean that my high side pressure is in the 240-270psi range.

Your first step should be to fully vacuum down the system and hold the vacuum for 30 min or so to make sure all non-condensables and moisture is removed from the system. Then recharge with the proper weight of fresh R134a. Since the system is variable capacity based on suction pressure, the correct amount of refrigerant is very important for proper operation. The 9-5 takes 875 grams or 30 ounces of R134a.

The air not coming out of the dash vents is a different problem. Probably the linkage between the stepper motor and the air distribution flap is not attached correctly. There's a special mention of this in the WIS. I had the same thing happen about a year ago on my car. The metal rod popped out of the plastic bushing. A few seconds to pop it back in and all was well again.

Hope this helps - make sure to let us know what you find,
Michael

posted by 65.30.16...

Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!