How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask greasemonkey2386 Your Own Question

greasemonkey2386
greasemonkey2386, ASE Certified Technician
Category: Car
Satisfied Customers: 274
Experience:  ASE Certifications A1,A4,A5,and A7 10+ years professional hands-on experience
Type Your Car Question Here...
greasemonkey2386 is online now
A new question is answered every 9 seconds

Saab 9-3 2.0T: I suspect the cabin fan blower resistor on my

Resolved Question:

I suspect the cabin fan blower resistor on my 2006 Saab 9-3 with ACC is faulty, though I am not sure. A couple days ago, I took out the blower assembly and lubricated the motor bearings and cleaned up some corrosion as the motor had seized and wouldn't turn at all. After testing the blower and re-installing it, all worked well. Within a day a new problem arose-- the blower would blow only at the lowest speed, regardless of whether it was set at low or high and turned off when the car was turned off. I have cleaned contacts on the motor and resistor. The fan blew when voltage was applied to the motor from an external source, and I checked voltage on the resistor pack that showed an increase as I increased fan power on the ACC control panel with the max being about 8 volts. I have done everything I can to insure the contacts making good contact between the resistor and motor. Any ideas? Do I need a new blower motor resistor?

Submitted: 1 year ago.
Category: Car
Expert:  greasemonkey2386 replied 1 year ago.
hello, when resistors go bad they typically will only work on high not low, have you checked to see if you are getting signal that changes when you change blower speed?
Customer: replied 1 year ago.

Yes, I hooked up the voltage meter to the contacts on the resistor pack that connect with the blower motor. Off had a reading of zero, with an increase each time I increased blower strength with it leveling off around 8 volts at high speed. I'm totally stumped. To me it seems to point to a bad connection between the resistor pack and the motor, yet I've done everything I can think of to fix that.

Expert:  greasemonkey2386 replied 1 year ago.
you should be getting 12 volts on high
Customer: replied 1 year ago.

That's what I thought. But, I also know that voltage does not necessarily mean current.

If it helps, the fan was set to high for quite a while to get the motor to turn at all, but that was due to a very stiff (and later seized) motor. Could that have caused harm somewhere?

Expert:  greasemonkey2386 replied 1 year ago.
its possible, what happens if you supply 12 volts to the fan?
Customer: replied 1 year ago.

When we supplied the 12 volts, the fan blew full blast instantly.

Expert:  greasemonkey2386 replied 1 year ago.
the fan control unit is bad in my opinion, you have 12 volts inbound from a fuse and the voltage is adjusted internally to control fan speed
greasemonkey2386, ASE Certified Technician
Category: Car
Satisfied Customers: 274
Experience: ASE Certifications A1,A4,A5,and A7 10+ years professional hands-on experience
greasemonkey2386 and 12 other Car Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time! Paul M Corpus Christi, TX
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician