Are you sure there's not something like a loose piece of insulation or
paper or something blocking part of the AC eva****ator core... so the
driver's side just isn't getting all of the cold air it's supposed to?
I had a foam "gasket" come loose in my Silverado's heat duct... and it
made it's way into the squirrel-cage blower.
"Ray" <rgh1016@[EMAIL PROTECTED]
> wrote in message
news:YbSdnUs5hqciYlvanZ2dnUVZ_rCtnZ2d@[EMAIL PROTECTED]
> Here's what I have learned in the process of trying to isolate this
> problem:
>
> 1. No OBD current codes are indicated when accessing the diagnostics
> through the climate control panel. A history code of 105 shows because
I
> removed and replaced the driver-side blend door motor.
>
> 2. With the driver-side blend door motor removed I could detect no
> binding when physically moving the blend door from full-heat to
full-cold
> position. However, when the blend door was physically moved to the full
> cold position the temperature out of the driver-side vents was the same
as
> out of the passenger side in single mode operation.
>
> 3. Changing the driver-side temperature control from full heat to
full
> cold positions appears to cause the driver-side blend door motor to
move
> through its full travel (that is, from the full heat index marking on
the
> motor to the full cold index marking). However, the driver-side outlet
> temperature is approximately 15 degrees warmer than the passenger outlet
> temperature when the temp control is in the max cold position.
>
> 4. Replacing the driver-side blend door motor and the exterior temp
> sensor did not correct the problem.
>
> It appears to me that for some reason the driver-side blend door is not
> being moved to the full cold position when the motor is installed and
the
> temp control is set at max cold even though the motor appears to move to
> the full-close index mark. When I drive the motor to the full-cold
> position and remove it from the air box, the blend-door appears to be
> sitting in the full cold position.
>
> Is it possible the a/c & heater controller is commanding the blend-door
> motor to a position just off the full cold position even though the
motor
> appears to be at the index mark?
>
> Because of item 2. above, I am convinced the blend-door motor is not
> moving the door to the full cold position even though the shaft position
> index on the motor appears to indicate otherwise.
>
> Is it possible to adjust the blend door shaft positionslightly so the
> motor will definitely move the door to the full cold position when the
> temp control is set to max cold?
>
> Ray
>
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