Last post on Jan 17, 2013 at 7:19 AM
You are in the Saab 9-5
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Saab 9-5, Heating / Cooling, Sedan, Wagon
#4 of 36 2000 9-5 heater/fan does not work when the engine is warm
Jan 14, 2007 (7:41 pm)
I recently noticed a problem with my 2000 Saab 9-5 heater/fan. When I start the car "cold", the heater fan comes on and works fine as long as I'm driving. However, when I turn off the car for a few minutes to an hour (not long enough for the engine to cool?), when I restart it, the fan does not blow at all - even when I manually punch it up to max. This is very hazardous in Minnesota - tonight I had no defrost after a trip to church! Anyone seen something like this? Thoughts on what to troubleshoot?
#5 of 36 Climate control woe's....
Feb 01, 2007 (8:40 pm)
Try pressing the Auto+Off buttons simultaneously. It'll run a self diagnostic and display codes if there's any issues outside of code zero. It'll also recalibrate the system as well.
If you see a code 08 pop up, take a deep breath before hearing the dealer estimate!!
Google 'saab 9-5 code 08' for alternative fixes.
#6 of 36 Re: 2000 9-5 heater/fan does not work when the engine is warm [djlee4]
Apr 06, 2007 (8:45 am)
Sounds like the resistor for the fan. Not too expensive, I had the same problem.
#7 of 36 1998 SAAB 9-5 heater problem
Jan 20, 2008 (3:19 am)
My Saab 9-5's heater has stopped working. When it stopped, it briefly worked again after turning it off and on again but know it is only blowing out enough hot air to eventually clear a small circle at the bottom of the windscreen. I havre tried the auto and off button diagnostic check and the code " 0 " comes up on the display. Any ideas what the problem could be ?
#8 of 36 Re: 1998 SAAB 9-5 heater problem [joncragg]
Jan 22, 2008 (10:14 am)
It is what is called a bad heater box and fairly expensive $1500-$1800. it distributes the heat/air evenly throughout the passenger compartment. The parts are not that expensive, but the entire front console (climate control, stereo, transmission shifter, etc) needs to be pulled out of the car to get to it. It takes approx 12-15 hours labor.
#9 of 36 Re: 1998 SAAB 9-5 heater problem [eurospecialist]
Jan 22, 2008 (10:20 am)
sorry, my answer was to the question about heat coming out of one set of vents and cold air coming out of the other side of vents..
#10 of 36 Re: 1998 SAAB 9-5 heater problem [joncragg]
by MrShift@Edmunds HOST
Jan 23, 2008 (5:50 pm)
I'd check for low coolant level. Is your engine temperature gauge suddenly reading lower than normal? If so, your thermostat could be stuck open. If the temp gauge reads fine, and you have plenty of coolant in the system, I'd guess you have a sticking heater valve.
If you get lots of heat down to the floor but not much up top, that might be something more connected to hypothesis.
#11 of 36 Re: 1998 SAAB 9-5 heater problem [Mr_Shiftright]
Feb 02, 2008 (5:39 pm)
The heater on these cars uses an electrically driven vacuum valve that further operates a vacuum controlled heater valve. On V6 models air can get trapped in the system and that will cause issues. The most common problems are related to the blend door operation, however. The website saabserviceshas some pretty good information relating to the hvac system on these models, including a chart defining the codes that may be displayed on the ACC unit.
#12 of 36 Re: 1998 SAAB 9-5 heater problem 
by MrShift@Edmunds HOST
Feb 03, 2008 (10:20 am)
Mighty handy reference. Thanks for posting that for 9-5 owners. Man, all that trouble being caused by a few cheesy plastic parts.
Aug 01, 2008 (1:57 pm)
Hello all, new to this. I have a 2000 9-5 V-6 Sedan with ACC issues. I get a 3 on the left and 13 on the right when I run the ACC diagnostic. The drivers side defrost and vents blow the correct temperatures and the right defrost/vents blow hot unless I turn the temp down all the way and turn the blower on high, then it cools slowly. Multiple problems?