heater noise

I have a Windstar 2002 and when I move the front temp control all the way to cold, I hear some knocking sound coming from inside the heater console.

Any suggestions. I do have heat and AC. When I move the control toward warmer air - the sound goes away.

What is the cause and solution?

I got the same thing your blend door is about to go. mine works but it takes it time but you will need to fix it .You got to pull the radio out though. There is a helper on here that can give you info and I know he will answer this post. Im gon'a send him a message once I get the radio out. need to stop by my friends first he has the tool.Got busy doing other things on the winstar so I had not started on it yet but spring is here and I live down south so It will be soon. Gary

Thanks Gary. If you get more information, let me know. It's been cold in DC so it's hard to work on it right now.

If it is your blend door actuator motor you should be able reach it w/o removing the radio. I could not get my radio out so i discovered I could reach the motor by taking out the lower console unit. There sure are lots of past threads on this subject.

[ There sure are lots of past threads on this subject.[/QUOTE]


Can you point me to or provide link where the past threads may be on this subject. I have been looking but can't find them.