Heater/AC Air Duct Valve Hunting

The heater/AC air duct valve motor hunts when my 2005 is initially powered up. By "hunting" I mean it sounds as if the valve motor was trying to open and close the valve continuously and rapidly, but never getting the valve to the limit switches which would stop the motor. This hunting stops immediately when I press the inside air (recirculate) button on the steering wheel, the motor stops hunting and the valve goes to the inside air position. Then immediately after, I can press the outside air button and the valve is transferred to the outside air position and stops with no hesitation.

Has anyone else noticed this with a 2005, or with any Gen-II? I'm sure it's not good for the motor to hunt like this. Is there something I can do to stop this, like cleaning and lubricating the valve linkage? Or is it too difficult for a DIYer to get into the mechanism?

Thanks for any suggestions.

 

Thanks, Vertex, that's helpful. However, I don't know where the servo is located, or the connector, or even how to gain access. Is there a link to documentation or a service manual for that system or area?

 

Hi Vertex, unfortunately I haven't had a chance to look for the servo motor connector, though I've read that it's somewhere in the passenger side foot well area, possibly up under the dash. I hope to look for it today because my plate's kinda empty. A retirees life is s-o-o-o busy ....

 

OK, if the air mix servo motor connector is in the passenger compartment, it is somewhere up within the dash, behind or above the glove box. I don't figure that correcting that problem is worth disassembling the dash. On the other hand, can I gain access to that connector, or to the servo motor itself from within the engine compartment?

Thanks

 

Thanks Vertex, unfortunately it may be a day or two for the PM. My ISP (Cableone) started converting to a new e-mail system this past Friday and as of this morning is still unable to serve customers. I'll PM you as soon as my e-mail account is stable and reliable.

Note that I did not say "service customers" which they appear to be doing very well...in the animal husbandry sense.