Nice fix. Is this cable accessible from underneath the dash?Accidentally found/fixed the noise. I greased the cable for the heater valve where it comes through the firewall and the noise stopped. Found a thread here that briefly mentioned greasing the cable as routine and decided it couldn't hurt.
I ran the knob all the way hot and rubbed a little grease on the cable and turned the knob cold to hot a few times and low and behold, much quieter.
My guess is that the little motor that runs the cable was struggling with the sticky cable and chattering.
The area I greased was under the hood. Behind the engine. If you lean over the engine you can see the cable where it comes through the firewall and operates a valve on a hose. Turn the heat knob all the way to hot to extend the cable all the way out and put a small amount of grease on the cable and rub in with your fingers. Don't overdo the grease, a little dab will do ya. DNice fix. Is this cable accessible from underneath the dash?
Buffalo, thanks for alerting me to the existence of that thread. Here's a link to it for posterity. Page 5 has good instructions. http://www.odyclub.com/forums/52-2005-2010-odyssey/46646-hot-air-driver-side-vents-cold-passenger-side.htmlIf you do a search in this forum, I believe you will find a thread about that noise and relates to the temp control unit that the cable is attached to under the dash. Something about removing that unit, cleaning the contacts and regreasing it. Mine does the same thing and I will be doing it within the next couple of weeks.
PS:Sounds like the unit is 'hunting' for the right position.