AC/heater not working properly

Hi,

What you described sounds like a faulty blend air door. Has it started working again properly or are you still having problems?

The blend air door actuator is what is used to allow either cold air or hot air to enter the vehicle. It's located under the dash on the HVAC box. I attached a pic below of the one responsible for the driver's side of the vehicle.

The vehicle should have a dual climate control. Did you notice if the problem was related to both sides of the vehicle or only the driver's side?

Let me know.

Joe

Hi,

Honestly, it sounds like the actuator may be going bad. That is my first suspect.

Is there anything you can think of that seems related to it happening (other than turning it off)?

I dug through and found a technical service bulletin that seems somewhat similar. However, I don't know if you have dual climate control. If you do, take a look through this and let me know if the symptoms seem to mirror what you experience. Also, this includes diagnostics.

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2010 Ford Fusion FWD L4-2.5L
A/C - Stuck In 'HOT' Mode With A/C ON
Vehicle Heating and Air Conditioning Technical Service Bulletins By Symptom A/C - Stuck In 'HOT' Mode With A/C ON
A/C - STUCK IN 'HOT' MODE WITH A/C ON
TSB 09-17-4

09/07/09

DUAL AUTOMATIC TEMPERATURE CONTROL
(DATC) - PASS - TEMPERATURE BLEND DOOR
STUCK IN HOT MODE - BUILT BEFORE 6/1/2009

FORD:
2010 Fusion, Fusion, Fusion

LINCOLN:
2010 MKZ

MERCURY:
2010 Milan, Milan

ISSUE
Some 2010 Fusion, Milan, MKZ, Fusion Hybrid, and Milan Hybrid vehicles equipped with dual automatic temperature control (DATC) and built before 6/1/2009 may exhibit a passenger temperature blend door stuck in hot mode. This condition typically occurs most often when cycling the A/C control temperature from extreme cold to hot and from hot to cold.

ACTION
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

NOTE
THIS PROCEDURE IS ONLY FOR VEHICLES EQUIPPED WITH DATC CLIMATE CONTROL SYSTEMS.

1. Verify the Concern. Perform this procedure with a person sitting in the driver's side only.

A. Idle the engine at an ambient temperature of 60 °F (16 °C) or higher until the engine is fully warmed up.

B. Set the DATC control head to 60 °F (16 °C) for both drivers and passengers sides.

C. Set the mode to panel/vent and ensure A/C is switched-on.

D. Set the blower to highest speed. Idle the engine for 5 minutes with the hood down. The driver's left-center vent discharge air temperature should be a minimum of 60°F (16 °C) when DATC is set at 60°F (16 °C). The passenger's right-center vent discharge air temperature should be a minimum of 60°F (16 °C) when DATC is set at 60°F (16°C).

E. For both sides:

(1)If A/C performance is met on both sides, return the vehicle to the customer and do not continue with this procedure.

F. For Drivers side:

(1)If the A/C temperature discharge on the drivers side is met, return the vehicle to the customer and do not continue with this procedure, if the drivers temperature is not met, proceed with normal diagnostics in Workshop Manual (WSM), Section 412-00.

G. For Passengers side:

(1)If the temperature discharge on passengers vents is not at 60°F (16°C) when the DATC is set at 60 °F (15°C) and it remains in hot mode, with temperatures above 80°F (27°C) off the vents, proceed to Step 2.

2. Is the temperature blend door on the passengers side stuck in hot mode when DATC is set at 60 °F (16 °C)?

A. No - Proceed with normal diagnosis, do not proceed with this procedure. If other concerns occur, proceed with normal diagnosis in WSM section 412-00.

B. Yes - Proceed to Step 3.

3. Reprogram the climate control module to the latest calibration using IDS release 62.09 and higher. This new calibration is not included in the VCM 2009.7 DVD. Calibration files may also be obtained at the website.

A. If the temperature on the passengers side remains in hot mode after DATC programming, proceed to Step 4.

B. If the temperature on the passengers side is corrected release the vehicle, do not continue with this procedure.

4. If vehicle was built on or before 4/6/2009 replace the right hand side temperature blend door and upper heater core and evaporator core housing divider, refer to WSM, Section 412-01 under removal and installation of evaporator core procedure. If built after 4/6/2009 proceed to Step 5.

5. If vehicle was built on or after 4/6/2009 to 6/1/2009 replace the right hand side temperature blend door only per WSM, Section 412-01, under Removal and Installation of Evaporator Core procedure.

If other abnormal conditions exist, follow normal diagnostics in WSM, Section 412-00. Return the vehicle to the owner and explain how the feature works.

See pic 1

________________________________________

Let me know.
Joe

Hi,

Then the one that is relevant is the left side. Here are directions for replacement. The attached pic correlates with he directions.

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2010 Ford Fusion FWD L4-2.5L
Temperature Blend Door Actuator - LH
Vehicle Heating and Air Conditioning Air Door Actuator / Motor Service and Repair Removal and Replacement Temperature Blend Door Actuator - LH
TEMPERATURE BLEND DOOR ACTUATOR - LH
412-01 Climate Control 2010 Fusion, Milan, MKZ, Fusion Hybrid, Milan Hybrid
REMOVAL AND INSTALLATION
Temperature Blend Door Actuator †LH

pic 1

Item Part Number Description
1 †LH temperature blend door actuator electrical connector (part of 19D887)
2 W712320 LH temperature blend door actuator screw (2 required)
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 to the right of the accelerator pedal.

Disconnect the LH temperature blend door actuator.
Remove the 2 LH temperature blend door actuator screws.
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 the 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 DEFROST/PANEL/FLOOR operation.

Let me know what you find.

Joe