This has been posted already on the Diesel post site. But I was directed here by the moderator.
This is to clarify my message from the last post. The subject might help (I'm new at this as you can see). I have a heater control valve that I have dismantled cleaned, and reassembled. I found the line up pins on the gears, and have tried to keep everything in sinc, but I think the feedback pot was set up to around 4K ohms, How critical is this setting, and where should the valve be positioned. When I took it apart I found it in the mid position. Also for those who would like to know, I might have found a replacement for the little motor inside I am waiting for a call back from the motor manufacturer.