Even if the car is turned of and the key the cabin fan continu to blow. The only way to stop it is to pull off the fuse. The instant I put it back it start blowing at maximum. All my controls on the ac module works excepte I can't change the speed of the blower and I can't turn it off. And i think the ac start automatically to. I've chan the speed resistance and it still does it. The minute I plug the control wires (smaller size) on the resistance the blower start.
The A/C control module is bad.
SOURCE: 2004 saab 9-3 aero- cabin fan not blowing air
Did you manage to solve this problem with your fans? I have an Aero 93 54plate and has just done the same thing. I dont have the fuse panel menu so I don't know which fuse to try & change, but this didn't seem to solve the problem for you??
SOURCE: I also have a 2004
Hello.
There are two probable causes for this problem.
The first is the fan power relay is sticking in the closed position and drawing power even with the key off. When you disconnect the battery the relay resets itself and you are back to "normal" until you run the cycle over again.
You noted that your SAAB has manual climate controls. It still may be a good idea to check the BCM harness ground connections. BCM is the "Body Control Module". I do not have a wiring diagram available for your car so can offer no additional advice other than to say that millions of dlooars are spent in the USA every year due to dirty or loose ground connections on computer and module harnesses.
All the best.
SOURCE: blowers constantly blowing even without key in the ignition
You definitely have a short somewhere in the circuit. I dont know if its in the air speed control knob, the fan motor, the key switch, or a relay somewhere. If the fan kept blowing even after you removed the fuse, my first guess would be somewhere under the hood in a relay, or the key switch. Because everything usually turns off when you turn off the ignition key. But I am no Saab expert and electrical issues are a real pain, no matter what the make of car.
I have had that problem with a car before and ended up, putting a on/off switch in the blower motor power wire and just turned it off and on that way when I needed it. Not really the true solution, but it worked for my 25 year old car at the time. Good Luck!
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