Hey everyone,
So last night I noticed my windshield not defogging on the right hand side.  Yep, cold air only out the passenger side, whether using the defrosters or the floor vents.

I've searched the forum and net for all the good hints.  It appears the SHO has a total of 4 of the actuators, 2 on each side.

From TASCA, I discern that a 3 of the 4 are part number YH1779 or AA5Z-19E616-C.  The 4th would be YH1769 or AA5Z-19E616-A.

I've seen reference that the two on the passenger side are the same, AA5Z-19E616-C, although apparently from the factory the PITA one is all black (this part number apparently is black and white now).

TASCA shows the only different one, AA5Z-19E616-A, is on the driver's side.

Is this all true, or, is there really 2 x AA5Z-19E616-C and 2 x AA5Z-19E616-A, with one of each being on each side (passenger and driver).

Additionally, is anyone aware of or have any hints on replacing the driver's side actuators?  I'm think of being proactive and replacing all 4 at once.

Thanks!
Kevin

I have no idea, but if you go to the main forum page and search blend door actuator, you will get quite few hits. Seems like a fairly common issue.

Good luck!

Thanks!  Yeah, I did search and read out everything I could find on here (and the web/other forums) including the excellent write up we have here.  I just couldn't confirm that the two on the passenger side are different or not part-wise.

To be honest, I couldn't find anything as a write up or info for the driver's side, other than there are two there also it appears.

When, or if, I tackle all four, I will provide my findings.  Definitely have to tackle the current bad one though....

I am not seeing anywhere there are two on each side?  i thought there was only one per side, but I could be mistaken.

As far as replacing the driver's side actuator:
Temperature Blend Door Actuator — LH

Item  Part Number  Description 
1  W701696  LH temperature blend door actuator screw (2 required) 
2  —  LH temperature blend door actuator electrical connector (part of 14401) 
3  19E616  LH temperature blend door actuator 

Removal and Installation

NOTE: The LH temperature blend door actuator can be accessed from below the LH side of the instrument panel.

• Remove the 2 LH temperature blend door actuator screws.
• Disconnect the LH temperature blend door actuator electrical connector.
• Remove the LH temperature blend door actuator.
• To install, reverse the removal procedure.

• NOTE: The purpose of the module actuator position calibration is to allow the HVAC module to reinitialize and calibrate the actuator stop points. To carry out calibration, carry out the following steps.
  Remove Smart Junction Box (SJB) fuse 15 for at least one minute.
• NOTE: When the ignition switch is switched to the ON position, the HVAC module will initialize and calibrate the actuators. Calibration of the actuators will take approximately 30 seconds.
  Reinstall SJB fuse 15. Turn the ignition switch to the ON position and wait 30 seconds before verifying correct LH temperature blend door operation.

Maybe you were thinking of the airflow and air inlet actuators:

Temperature Blend Door Position
The dual-zone EATC system uses 2 temperature blend door actuators to control 2 separate temperature blend doors. The temperature blend doors independently vary the LH side and RH side temperature settings, as desired. The temperature blend door actuators each contain a reversible electric motor and a potentiometer. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the temperature blend door. The HVAC module powers the actuator motors to move the temperature blend doors to the desired positions. The desired temperature blend door positions are calculated by the HVAC module based on the set temperature, in-vehicle temperature, ambient temperature and sunload.

The LH temperature blend door actuator is located on the heater core and evaporator core housing near the accelerator pedal. The RH temperature blend door actuator is located on the heater core and evaporator core housing to the left of the glove compartment.

Airflow Mode Door Position
The airflow mode door actuator uses a cam and lever assembly to position the airflow mode doors on command from the HVAC module. The mode door actuator contains a reversible electric motor and potentiometer. The potentiometer allows the HVAC module to monitor the position of the airflow mode doors. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the airflow mode doors. The HVAC module powers the actuator motor to move the airflow mode doors to the desired position. The HVAC module determines the desired airflow mode door position based on the calculated outlet temperature.

The airflow (defrost/panel/floor) mode door actuator is located on the heater core and evaporator core housing to the right of the steering column.

Air Inlet Mode Door Position
The air inlet mode door actuator moves the air inlet door between the fresh and RECIRC positions on command from the HVAC module. The airflow mode door actuator contains a reversible electric motor and potentiometer. The potentiometer allows the HVAC module to monitor the position of the air inlet mode door. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the air inlet mode door. The HVAC module powers the actuator motor to move the air inlet mode door to the desired position. The HVAC module determines the desired air inlet mode door position based on the calculated outlet temperature.

The air inlet mode door actuator is located on the air inlet duct and can be accessed through the glove compartment opening with the glove compartment lowered.

Thanks SHOdded!  Excellent info and looks like the driver side is straight forward.  Yep, looks like that explains all 4 (2-temp blend, 1-airflow mode, 1-air inlet mode) actuators.  I looked up the items on FordParts.com and found the following pic/info.  So, at least there, they call them all blend doors as a generic term.  There it lists 3 different callouts, 19E616A, 19E616B and 19E616C (note that there are 2 19E616Bs on the illustration).  See attachment.

What's odd is after expanding the callouts, the actual part number listed on all of them is 19E616A, however the "Y" part numbers are different.  19E616A=YH1769, 19E616B=YH1779, 19E616C=YH1778.

Trying to remember if this is typical with Ford part numbering or just typo......

Regardless, sounds like the PITA one is my culprit.  Still thinking about doing all 4 since I periodically hear clicking from the driver side too.

The "19E616A" is part of the full Ford OEM part number, it is not complete by itself.  For example, it may in actuality be preceded by F6DZ.  The YH numbers you are seeing are the Motorcraft numbers for the equivalent parts, since Motorcraft is part of Ford.

I believe the driver side one (LH) is (purportedly) more difficult, the passenger one (RH) is easier?

Oddly enough, TASCA and Rock Auto are listing YH1778 and YH1779 being equivalent.  Wonder if this is really true...

As for difficulty, from everything I've seen written up, the RH upper actuator (Temp blend door) is the PITA (on the Taurus).  There is a wire harness, box, etc. covering it up.  This one I am confident is out of order for me.

Now, the driver side might well be just as difficult!  I haven't been able to find any real world comments on changing the driver side ones.  If I replace those, I guess I will find out!

I would check out this link to get some insight,hope this helps any partner.  Z     http://www.how-tofind.com/tube/kq1IjAtmruI/2011-2015-ford-explorer-loud-clicking-in-the-dash-repair

The one behind the glove box that's near the cabin air filter is a piece of cake. I literally changed it in the parking lot of the dealership in less than five minutes.
That is the most common one to go bad