rear air knocking?

I bought a 2002 explorer xlt and the rear a/c works but there is a knocking
sound ( ~78 knocks/minute regardless of rear fan speed) coming from the rear
driver side. I started taking the rear interior panels off, I got to the
rear air conditioner and still couldn't pin-point it.

Anybody have this problem before or have any solutions?

thanks,
Tom

Knocking or ratcheting ??????


If ratcheting probably a blend door motor, try moving to hot/cold and or
floor/defrost to see if the noise changes


"tombstne" > wrote in message
...
> I bought a 2002 explorer xlt and the rear a/c works but there is a
knocking
> sound ( ~78 knocks/minute regardless of rear fan speed) coming from the
rear
> driver side. I started taking the rear interior panels off, I got to the
> rear air conditioner and still couldn't pin-point it.
>
> Anybody have this problem before or have any solutions?
>
> thanks,
> Tom
>
>