rubberchicken

Hi all!

My F150 is a 2008 XL model. I've been living with this problem for the past year but I'm finally aggrivated enough to want to get it fixed. I wanted to see if this is a common problem that other people have had.

The temperature control doesn't seem to work very well. For example if I set the dial at just a quarter above the coldest mark I usually get cool air, not cold air, and that changes from cool to hot! If I want cool air I usually have to turn the dial to the hot section then back to the cold section and I might get cool/cold air, but it will go from cool to hot and back again as I'm driving.

I first noticed the problem last summer when it was really hot outside and I cranked the truck. With the AC on full blast all I got was warm/hot air until I put the truck in drive and actually got moving, and then it changed to cool. The service dept. at my Ford dealership told me that was normal. But now this bit with the temp not staying at a constant level is really aggravating.

I did a search on here and didn't see anyone else with the same problem so I thought I would post something.

GATORB8

TSB 08-23-6
11/24/08
EATC - INTERMITTENT WARM AIR OUTPUT
TEMPERATURE SET 68-72 F (18-22 C) EMTC -
INABILITY TO CONTROL TEMPERATURE OUTPUT FORD:
2005-2008 F-15O LINCOLN:
2006-2008 Mark LT ISSUE
Some 2005-2008 F-150 and 2006-2008 Mark LT vehicles equipped with Electronic Automatic Temperature Control (EATC) may exhibit intermittent periods of warm air output in Auto mode with the temperature control set between 68-72 degrees Fahrenheit (18-22 degrees Celsius). Some 2005-2008 F-150 vehicles equipped with Electronic Manual Temperature Control (EMTC) may exhibit periods where the cabin temperature cannot be maintained with the control ****. Some customers may also complain the heat cannot be reduced without rotating the control **** well into the Cool/Blue range. ACTION
Refer to the following Service Procedure to correct the condition. SERVICE PROCEDURE
The condition may be caused by a faulty temperature blend door actuator. 1. Check actuator activity. a. EATC systems may be monitored with the IDS PID (LBLNDPOS). b. EMIC systems may be observed through the right side of the instrument panel with the glove compartment door positioned downward. 2. Erratic PID activity or an actuator that appears to be erratically hunting for correct position during the condition should be replaced. Refer to Workshop Manual, Section 412-01,for removal and installation details. NOTE THE IGNITION KEY MUST BE OFF WHEN REPLACING THE ACTUATOR. ENERGIZING THE ACTUATOR BEFORE INSTALLATION ON THE HEATING VENTILATION AIR CONDITIONING (HVAC) CASE WILL CAUSE THE PART TO BECOME MISS POSITIONED AND CORRECT ORIENTATION WILL BE LOST. INCORRECT ACTUATOR OPERATION MAY RESULT




Parts Block 9l3z-19e616-e Actuator - Motor Assembly

WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT : Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part. OPERATION DESCRIPTION TIME

082306A 2005-2007 F-150, 0.7 Hr.
2006-2007 Mark LT:
Replace The Temperature
Blend Door Actuator. (Do
Not Use With 19700D,
19700D6, 19616C,
12650D)

082306A 2008 F-150, 2008 Mark 0.5 Hr.
LT: Replace The
Temperature Blend Door
Actuator. (Do Not Use
With 19700D, 19700D6,
19616C, 12650D) DEALER CODING CONDITION
BASIC PART NO. CODE
19E6i6 42

rubberchicken

GatorB8, I've no idea where you found that bulletin but many thanks to you!! I thought maybe I was going nuts. Guess she's going in for her first trip to the shop. Hope it's the last one, too!

GATORB8

I've got online access to the Ford Service Manual.

If you're not under warranty anymore, make sure they only charge you the labor hours listed on the bottom of the bulletin.

rubberchicken

It should still be under factory warranty. It's an '08 with 10,300 miles on it.