Climate control problem

[12EdgeSport]

Being we've gotten a few cool mornings I've noted a problem. The climate control on my 2012 Edge Sport is malfunctioning. Regardless if it is set on dual or individual the drivers side blows cold air while the passenger side blows hot. The passenger side works fine as when calling for cold, it is cold, or hot and it is hot. However the drivers side always blows cold. The odd thing to me is when I manually shut the dash louvers on the drivers side to stop the cold the passenger side slowly cools down even though it is still set on 80 degrees. Why would manually shutting the drivers side change the air temp on passenger side? I don't get it. Anyone encounter a similar situation with their climate control? Doesn't matter if it is set on "auto" or "dual".....the drivers side will not get hot. Thanks in advance.

[WWWPerfA_ZN0W]

Could be a malfunctioning blend door, linkage, or a bad EATC unit. You can check to see if there are on-demand codes or continuous codes set in the EATC. As far as airflow, closing the louvers does not close off any part of the ductwork, so the air is being recirculated back into the system, and ends up on the passenger side. Apparently this recirculation is too much for the auto temp to overcome.

 

This procedure is for a 2007, hopefully still applies to a 2012:

 

EATC Module On-Demand Self Test

The EATC Module On-Demand Self Test will retrieve on-demand (hard fault) DTCs only, it will not retrieve continuous DTCs. Continuous DTCs can be cleared when exiting the EATC Module On-Demand Self Test. Make sure to retrieve continuous DTCs by carrying out the Electronic Automatic Temperature Control Module — Retrieve Continuous DTCs procedure before clearing any continuous DTCs.

• The EATC Module On-Demand Self Test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A scan tool must be used to retrieve these concerns.
• The EATC Module On-Demand Self Test will detect concerns in the system control functions and will display on-demand (hard fault) DTCs for concerns that are present during the self-test. The vehicle interior temperature should be between 4°C-38°C (40°F-100°F) when carrying out the self-test. If the temperatures are not within the specified ranges, false DTCs may be displayed.
• The self-test can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when the self-test is activated.
• To enter the self-test, press the OFF and DEFROST buttons simultaneously and release, then press the AUTO button within 2 seconds. The display will show a flashing "----" for a maximum of 20 seconds, after which "8888" will be displayed if there are no on-demand DTCs present. If DTCs are present, the EATC module will display the on-demand DTCs. Record all DTCs displayed.
• If any DTCs appear during the self-test, carry out the diagnostic procedure. Refer to the Electronic Automatic Temperature Control (EATC) Module DTC Chart and follow the ACTION for each DTC given.
• If a condition exists, but no DTCs appear during the self-test, GO to Symptom Chart condition: The EATC System is Inoperative, Intermittent or Incorrect Operation.
• Always exit the self-test before powering the system down (system turned OFF).
• Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.

EATC Module — Retrieve Continuous DTCs

The EATC module will retrieve only continuous (intermittent) DTCs when carrying out this procedure.

• Retrieval of continuous DTCs can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when retrieving continuous DTCs.
• To retrieve continuous DTCs, press the OFF and DEFROST buttons simultaneously and release, then press the RECIRC button within 2 seconds. The display will show a flashing "----" for a maximum of 20 seconds, after which "8888" will be displayed if there are no continuous DTCs present. If DTCs are present, the EATC module will display the continuous DTCs present. Record all DTCs displayed.
• If any DTCs appear, carry out the diagnostic procedure. Refer to the Electronic Automatic Temperature Control (EATC) Module DTC Chart and follow the ACTION for each DTC given.
• If a condition exists but no DTCs appear, GO to Symptom Chart condition: The EATC System is Inoperative, Intermittent or Incorrect Operation.
• To exit and retain all continuous DTCs, press any button except DEFROST. The EATC module will exit the retrieved continuous DTCs mode and retain all continuous DTCs.
• To exit and clear all continuous DTCs, press the DEFROST button. The EATC module will exit the retrieve continuous DTCs mode and all continuous DTCs will be cleared.
• Always exit the procedure before powering the system down (system turned OFF).
• Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.

[kidcolorado]

Looks like the post I'm looking for if only the links were still working. I have heat only on the passenger side. Did the self test and have a DTC of 9251, but cannot find the diagnosis. What is a 9251 code?

[enigma-2]

I believe it means "Break in circuit for interior temperature sensor".

[Timber]

On my Ford Edge 2011 SEL,

I did follow the procedure listed above by WWWPerfA_ZN0W, but could not trigger the EATC Self Test mode.

 

I did press the OFF and DEFROST buttons simultaneously and release, then press the AUTO button within 2 seconds.

The display did not show a flashing "----" .

 

Any hints?

 

Thanks,

 

My panel looks like below picture:

 

[WWWPerfA_ZN0W]

You would need to follow the procedure for 2011-14, it IS different.

http://www.fordedgeforum.com/topic/23097-2014-edge-limited-no-heat/

[enigma-2]

See if this video can help