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 Master Class Auto Your Own Question

Master Class Auto
Master Class Auto, ASE - Master Auto Technician
Category: Car
Satisfied Customers: 253
Experience:  20+ years, full time experience. Specialize in Diagnostics & Electrical
13828642
Type Your Car Question Here...
Master Class Auto is online now
A new question is answered every 9 seconds

location of the darn blend door and how do you get to it?

Customer Question

Where is the location of the darn blend door and how do you get to it?
Submitted: 5 years ago.
Category: Car
Expert:  Master Class Auto replied 5 years ago.
Hi Shade Tree,

This question is "vehicle specific". Can you please post your exact year, make and model? Thank you!

Best,
Master Class
Customer: replied 5 years ago.

19943 Licoln Town car --Signature series 4.6 liter engine- have replaced two componentas--one that controls blower speerd under the hood--one ATC control in dash. You guys said the blend door isn't working; bwhat controls that, and where is the door located in the car?

 

Customer: replied 5 years ago.
I haven't received any reply. Hasve you gone for lunch?
Expert:  Master Class Auto replied 5 years ago.

Hi Shade Tree,

 

I understand. Sorry for slight delay. OK, one last thing.

 

1) You made it sound like this question was already submitted to JA before. If so, was/is any other Experts involved currently? Was an older question closed and this one is new - but yet same problem area?

 

2) Also, please tell me your vehicle symptom or symptoms. If you replaced all those parts, you're obviously trying to repair 'something'. Do you have 'no heat' or a problem regulating temperature? Or, have you a problem controlling WHERE the air goes? Ex. Floor, vent, defrost and so on. Please let me know before I continue.

 

Best,

Master Class

Customer: replied 5 years ago.
I have no heat Cold air vents work fine. both heater hoses are hot. Door to let b,lower run hot air into car will not open. floor, vent , anbd defrost cont5rols direct airt wherre they should. Just no air blowing through hort heater core.
Expert:  Master Class Auto replied 5 years ago.

Hi Shade Tree,

 

OK I understand. You actually have no hot air getting to where it needs to go.

 

If both heater core hoses are hot - you have a control issue.

 

You likely have a seized blend/temp door actuator. Common on Ford/Lincoln/Mercury vehicles since the 90's up. I have replaced many over the years in the Taurus, Sable, Lincoln and so on.

 

Some Theory: That actuator should react to auto and manual temp inputs from control panel. Problem is, you basically have to remove the entire dashboard to gain access. However, I usually take the dash 'mostly' out. ( I lift it up just enough and support it while I work under it to R&R actuator) Problem is, once you get dash to the point of being able to partially remove, tilt and lift it - the time you save is minimal.

 

You see - in your vehicle the HVAC/Heater box is mounted so close to the bottom of dash - that you cannot physically get in there to remove the screws and release the actuator.

 

One Helpful Hint: I also think it's worth putting the Auto Climate Control unit into diag mode. Many times you can get codes which helps make sure you're going in the right direction. Let's say an HVAC Temp Sensor error code was stored - and no other. I'd replace that first, clear codes and retest before condemning the Actuator. But yes, they do fail a lot. I'm including photos.

 

If you accept I will work with you further as needed.

 

Blend Door Location:

Top (near center) of heater box, under dash, between top of heater box and underside of dash. Pics included. **NOTE** The image that shows two blend door actuators side by side, be it known, the white one is for a MANUAL system and the BLACK is for ATC. Look close at labels. Images are for reference only and actual production part and/or replacement part appearance may vary. Lastly, the image that shows the top of heater box is showing you where the actuator sits - after it's removed. So the actuator is not in that pic. It's location is.

 

Types

 

Removal

 

Removed

 

Best,

Master Class

Master Class Auto, ASE - Master Auto Technician
Category: Car
Satisfied Customers: 253
Experience: 20+ years, full time experience. Specialize in Diagnostics & Electrical
Master Class Auto and 8 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