New blend door actuator only blows at face-level

Amandeep Diagnostician Saskatchewan Posted   Latest   Edited  
Unsolved
HVAC
2015 Ford F-150 Lariat 5.0L (F) 6-spd (6R80)
Actuator Not Working

Brand new blend door actuator was installed and from Install it only blows out the front and won't switch to defrost or the floor and was told the actuator is working properly from dealership any suggestion

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Darrel Technician
Oregon
Darrel
 

Calibrated maybe or not installed properly

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Chris Technical Support Specialist
New York
Chris
 

Calibration should essentially be automatic, but can be forced after a battery reset by turning the key on. Check for codes Check for mechanical issues.

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Cmore Mechanic
Connecticut
Cmore
 

Dumb question but did you replace the correct actuator? Blend door is temp, mode door is position.

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Funny
Amandeep Diagnostician
Saskatchewan
Amandeep
 

Yeah the dealership replaced the mode door actuator and it was working fine before when I replaced it last winter

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Martin Instructor
British Columbia
Martin
   

What diagnosis have you done yourself at this point Amandeep? Are you and/or your customer both confused with the terms “blend” and “mode”? It is the mode door actuator that positions one or more doors to direct airflow. The blend door actuator blends hot and cold air for delivery of the desired temperature from the vents. Anything from coffee spilled down a duct to pencils and other junk can…

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Amandeep Diagnostician
Saskatchewan
Amandeep
 

So the vehicle went in for heat loss at low rpms and they ruelled it out that the blend door actuator was fault so they replaced the mode door actuator and the vents worked then the next Day and so on after the doors don't make any sound at all of them shifting to defrost or the floor that it's stuck in that position or the actuator just quit working eve though it's 2 days old know

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Martin Instructor
British Columbia
Martin
   

So Amandeep, for “heat loss at low rpms", first test and confirm that the cooling system through the heater core is able to attain and maintaining the correct temperature. Given the current weather, it is difficult to generate a lot of heat, especially if the engine isn't working hard. Heat loss is also quite different from an air delivery mode concern. You may need to inspect and confirm both…

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Mark Owner/Technician
California
Mark
 

What a kind and thorough reply Martin.

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Martin Instructor
British Columbia
Martin
 

Thanks Mark. It'ssimply about trying to assist our fellow technicians, without deriding or demeaning type comments. All too often by the time a person posts looking for help, they have exhausted avenues available to them. It's easy to jump all over someone and make rude remarks, while knowing little or nothing about their situation. Sometimes, all that it takes is to demonstrate a little…

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Danh Diagnostician
Viet Nam
Danh
 

Awesome Martin. Thank you for all the experience, lessons and kindly words.

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Martin Instructor
British Columbia
Martin
 

Hi Danh. Thank you for your kind words. In my role, I work with technicians hailing from all around the globe, whom have chosen Canada as their new home, as I did when I immigrated here from England in 1974. I was very fortunate, since English is my first language. Even US and Canadian written English still offers up a few differences to the written language that I learned, but they are…

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Robert Technician
Wisconsin
Robert
 

Hello Martin Thx for your insight about your diagnostic manner. This will help me while working on variety of stuff. thx Bob a

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Bill Diagnostician
Pennsylvania
Bill
 

Blend door for heat, Mode door for vent position.

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