Re: ACC question - Saab 9000 Bulletin Board - Saabnet.com
NG900 & OG93 |
Vintage Models |
Clubs & SOC |
Other Cars |
Member Photo Galleries |
Member Directory |
*Buddy Registry |
*Mileage Registry |
What's New |
Photo of the Month |
If you're really unlucky then both the cabin temp sensor and the air mixer sensor have issues.
Two white wires exit the air mixer sensor for a few inches and connect to the green/red wires that continue on to the ACC2. I would expect the point where the wires connect (white to green/red) to be insulated. But suppose there is no insulation or the insulation has decayed resulting in metal-to-metal contact. Then the ACC would get a reading of very low resistance which it interprets as a hot plenum. Hence the command to turn the blower on high.
The cabin temp sensor depends on a tiny fan to draw air from the cabin and blow it over a thermal sensor. Where you have air movement you get dust accumulation. You can determine whether your fan is working by very gently inserting through the sensor's opening a long wood toothpick with the ignition on. You'll hear it and feel it when the tip of the toothpick contacts the turning fan blades. If there's no evidence the fan is turning then remove the sensor, brush off the accumulated dust, then use a pindrop oiler (the tip of a small nail or needle will do) to apply a tiny drop of synthetic oil to lube the fan. Synthetic oil won't mess up the fan's plastic like dyno or semi-synthetic can. I did this 10 years ago using Mobil 1 5w20 synthetic when the tiny fan made a big noise. The sensor has worked well and quietly ever since.
->Posting last edited on Tue, 20 Feb 2018 13:31:45.
Posts in this Thread:
- ACC question, skibumm100, Sat, 17 Feb 2018 07:07:28
- Re: ACC question, sam96CS , Mon, 19 Feb 2018 20:35:15
- I dunno. My '96 works as you describe...., Noel , Sat, 17 Feb 2018 11:03:13
- Re: blower, Simon S, Sat, 17 Feb 2018 10:02:35
- Re: ACC question, Simon S, Sat, 17 Feb 2018 10:00:30
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.
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 -
Your address is: 188.8.131.52 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.
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!