So, I don't know if I've just never noticed this before, or if this is abnormal, but...

The other day I had my heat on while driving, and my radio off. I pulled up to a light and got a bit warm, so I turned the dial down. When I turned the dial, I heard the blend door motor moving, but it seemed a bit louder. No clunks, no rattles, just the sound of the actuator and motor doing it's job, but it just seemed loud to me to be able to hear it over the engine noise.

Can anyone else hear their blend door moving when your truck is on?

 

When I first start it up I do....but after that not really at all

 

Hmmm... Even if all other components (stereo, cd, etc...) are shut down?

I can only hear it move when I change the dial and there is no other noise besides engine noise..

 

take it in and get it noted so if it goes out the truck will be fixed buy ford.
i can hear mine a little but i don't listen for it. it is not that loud so i didn't give it a second though!

 

Yeah mine's not overly loud either, just never heard it before! I called down to my dealer and inquired about the "issue" and he explained what I already knew about the movement of it and what it does, and said unless it's rattling or groaning it shouldn't be an issue.

Good analogy to what it sounds like: A CD being loaded into the CD player, only a little quieter.

 

^ i think you NAILED IT! thats what mine sounds like!

 

Mine does it. air output increases when stopped... Then at about 35 mph there door opens again. its repeatable... I think its a software fix for an anemic heater configuration.