A/C blowing hot only on the passenger side

Tiny
CHRIS FOWLER
  • MEMBER
  • 2011 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 155,000 MILES
So we had the infamous clicking noise with accompany hot air out passenger side at all times, normal conditioned air from driver side. We replaced blend door 1 behind taduo/glove box. New clicking noise, so we replaced second blend door under center dash in front of center console. Now there is no clicking but still have the problem of conditioned air from driver side and hot air from passenger side. (Lariat with dual climate controls). Any ideas?
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Tuesday, December 1st, 2020 AT 5:26 PM

9 Replies

Tiny
JONNYB1963
  • EXPERT
Good afternoon Chris,

Okay, so what I got out of this is that you replaced the right hand side blend door actuator and the Defrost/Panel/Floor blend door actuator (center of dash).

The clicking you refer to is a common thing when the potentiometers wear out on the blend door actuators. These tell the HVAC control unit what position the doors are in. Without them they are lost and try to keep moving the door past where it was intended to stop.

It sounds to me like you said the clicking went away after the units were replaced. Can you give me a rundown on what is happening now?

Lets start with the drivers position. Does all work normal there? Hot when expected, cold when expected?

Next is the Climate Control set to Dual or Single?

If it is set to dual, are you able to change the Passenger Temperature hotter/colder to make any difference at all?

Does your Defrost/Panel /Floor modes work or are they having problems as well?

Regards
Jon
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Wednesday, December 2nd, 2020 AT 10:09 AM
Tiny
CHRIS FOWLER
  • MEMBER
Thanks for the response. So I just went out and tried different settings. Drivers side seems to adjust with the dials appropriately. Passenger side when used separately and dual doesn't seem to adjust temperature in any direction but remains constant on every setting and temperature. The defrost works on drivers side, but felt like no air or much less air came out on the passenger side.
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Wednesday, December 2nd, 2020 AT 10:35 AM
Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

The passenger side blend door actuator is on top of the heater box in the center of the dash.

https://www.2carpros.com/articles/replace-blend-door-motor

I attached pictures and a procedure for you.

Make sure you follow the calibration sequence at the end.

Roy

Removal and Installation

Remove the Audio Front Control Module (ACM) . For additional information, refer to Section 415-00 .
While pushing the glove compartment door tab, position the glove compartment downward.
imageOpen In New TabZoom/Print
Detach the 2 wire harness pin-type retainers and position the wire harness aside.
imageOpen In New TabZoom/Print
NOTE: The forward Right Hand (RH) temperature blend door actuator screw can be removed with a combination wrench. With one hand working through the ACM opening, hold the top end of the combination wrench. With the other end of the combination wrench pointing away (toward the right front corner of the vehicle), and with the other hand working through the glove compartment opening, the combination wrench can be manipulated.

Remove the 2 RH temperature blend door actuator screws.
Detach the temperature blend door actuator.
Disconnect the temperature blend door actuator electrical connector.
Remove the temperature blend door actuator.
NOTICE: The ignition key must be off when replacing the actuator. Energizing the actuator before installation will cause the part to become positioned incorrectly and proper orientation will be lost. Incorrect actuator operation will result.

To install, reverse the removal procedure.
NOTE: The purpose of the module actuator position calibration is to allow the Heating Ventilation Air Conditioning (HVAC) module to reinitialize and calibrate the actuator stop points. To carry out calibration, carry out the following steps.

Remove Body Control Module (BCM) fuse 46 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 BCM fuse 46. Turn the ignition switch to the ON position and wait 30 seconds before verifying correct mode door actuator operation.
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Wednesday, December 2nd, 2020 AT 12:00 PM
Tiny
CHRIS FOWLER
  • MEMBER
I replaced that one. I will try the calibration sequence now to see if it fixes it. Thanks.
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Wednesday, December 2nd, 2020 AT 12:05 PM
Tiny
ASEMASTER6371
  • EXPERT
You are welcome.

Always glad to help.

Roy
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Wednesday, December 2nd, 2020 AT 12:06 PM
Tiny
CHRIS FOWLER
  • MEMBER
Roy, I pulled fuse 46 with truck off reinstalled and turned on. No change. I didn't hear anything happen that would indicate a recalibration. Should there be an audio indication? Any steps I missed?
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Wednesday, December 2nd, 2020 AT 12:24 PM
Tiny
ASEMASTER6371
  • EXPERT
The only thing you should notice is after you install the fuse and turn on the key, you should hear the mode doors move back and forth.

Roy
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Wednesday, December 2nd, 2020 AT 12:33 PM
Tiny
CHRIS FOWLER
  • MEMBER
So tried all the solutions so far. Still same issue. Any other factors to think about? Again there was clicked we replaced blend doors and clicking stopped. However the issue still persists.
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Wednesday, December 2nd, 2020 AT 1:31 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay, when you replaced the blend door actuator, did you move the door by hand and see if you had heat? You need to make sure the mode door itself moves.

Roy
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Wednesday, December 2nd, 2020 AT 2:06 PM

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