BLOWER NOT WORKING PROPERLY, STRUGGLES TO COME ON.
BLOWER HAS BEEN WORKING INTERMITTENTLY AND NOW IS MAKING NOISE LIKE IT IS TRYING TO KICK IN BUT CAN'T, WHERE IS THE BLOWER LOCATED AND IS THIS A COMMONN ISSUE. THIS IS MY SON'S VEHICLE AND I AM LOOKING FOR SOME HELP ON WHAT IS HIS BEST SOLUTION FOR REPAIR, TAKE IN TO REPAIR SHOP OR A DO IT YOURSELF JOB. THANKS, ANDY
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Re: BLOWER NOT WORKING PROPERLY, STRUGGLES TO COME ON.
I would bet the cabin/pollen filter has not been changed for a long time. This can cause lots of issues including incipient blower motor failure. For illustrated tutorials on all things ACC related for Saab 9-5, including step by step replacement and repair procedures, see this site under A/C and climate control.
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See if you can find the exact location of the noise.
When you replaced the blower, did you clean out the plenum all the way back to the air inlets? There is some play in the blower bearings which can cause rubbing when starved for air. Also, could be rubbing on debris in the plenum.
Another possible cause of this noise is a fluttering damper. Depending on the HVAC option you have, the mixing and duct selection dampers may not be opening/closing properly. If they are vacuum actuated, there may be a leak at or in a control solenoid or the switch. Try all temperature and vent settings to see if the noise changes. If they are working properly and the noise continues, then it's usually a blower problem or not the HVAC system making the noise.
If I am understanding you correctly, the blower fan is not running. You will need to take things apart until you can get to the blower itself. (Or you could test for voltage at the blower control switch) But I am guessing it is the blower that has gone bad, not the switch. However, they usually get noisy, and then go bad. Test for 12 volts going into the blower motor. If you have voltage at the blower motor, and it doesn't run, replace the blower motor.
It may just be time to replace the blower motor or the blower resister. The brushes in the fan motor assembly may be worn and not making very good contact. Using a test light at the connection at the fan motor harness is a good way to see if you're getting power to the motor when requested, if so, it is time to replace the blower fan assembly.
Mine use to work on high only. It was the switch cylinders, something like that. It was an easy fix. Now my blower motor works intermittently. If I kick it, it turns back on. It is located on the passenger side close to the door side directly above your feet (below the jockey box). Kick straight up. If you need to replace it it is also an easy do-it-yourself repair. Make sure before you go out and replace your blower motor that you check your switch. A lot of repair shops will replace the motor w/o checking the switch, you end up paying for 2 repairs. You can make sure it's not the switch by jumping (bypassing) the switch.You apply jumper wires (not cables) directly to the motor, if the motor turns on you know it's the switch.