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 Mr. EdC Your Own Question

Mr. EdC
Mr. EdC, ASE Mastertech
Category: Car
Satisfied Customers: 224
Experience:  ASE Mastertech, 30+ years working on all makes and models in independant repair shops.
17852688
Type Your Car Question Here...
Mr. EdC is online now
A new question is answered every 9 seconds

3 I: running the air conditioner a 66 degrees..blower..happened once

Resolved Question:

I have a 2002 saab 9-3 I was running the air conditioner a 66 degrees for 40 minutes it just shut off and 10 minutes later came back on with a lot of noise like ice passed through the blower is there something going wrong with the air it still gets real cold this only happened once.
Submitted: 5 years ago.
Category: Car
Expert:  Mr. EdC replied 5 years ago.

Hello xdisastryx

I can assist you with that question.

The AC system, in a nutshell, consists of 4 main components. The COMPRESSOR draws in low pressure refrigerant gas, and boosts the pressure. The high-pressure refrigerant gas then goes in the CONDENSOR, a radiator-like component that removes heat from it and causes a change from a gas to a liquid. From there, the high-pressure liquid refrigerant is fed through a restriction of some type. The liquid refrigerant , at ambient temperature , wants to flash into a gaseous state, which, like boiling water to make steam, requires heat. By forcing the liquid through a restriction, or orifice/expansion valve, the rate at which it reverts to a gas can be controlled, and more importantly in your case, where the heat required to do so comes from can be controlled. There is another radiator-type component under the dash called the EVAPORATOR CORE, which, as its name implies, is where the high-pressure liquid refrigerant is allowed to evaporate back into a low-pressure gas, and by doing so, the heat is removed from what it touches, this Evap core. We blow air across the evaporator core and-bingo-cold air. Now, that evaporator core is the thing that condenses water on it, much like a glass of ice water sitting on a table will.As long as the temperature of the Evaporator core itself stays above freezing, the water condenses and runs off. However, if the Evap core temperature drops to BELOW freezing then that condensate can freeze on the evap core, blocking the airflow across it.There are switches and sensors that are supposed to keep this from happening, but, like anything else, even with every thing's operating as designed, under certain conditions evap core freeze-up happens Especially if the temperature setting is set low, the fan speed is low, and the system is set on Recirc. There is a sensor that is supposed to shut the compressor off if the evap core gets too cold, which is what I suspect happened to you. So it probably was indeed ice breaking loose from the evap core you heard. If it happens again, then have the system checked -that evap temperature sensor may be going bad.

Mr. EdC, ASE Mastertech
Category: Car
Satisfied Customers: 224
Experience: ASE Mastertech, 30+ years working on all makes and models in independant repair shops.
Mr. EdC and 4 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
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

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
 
 
 
Chat Now With An Auto Mechanic
Mr. EdC
Mr. EdC
Shop foreman/s service manager
56 Satisfied Customers
ASE Mastertech, 30+ years working on all makes and models in independant repair shops.